/**!
 * Sortable 1.15.0
 * @author	RubaXa   <trash@rubaxa.org>
 * @author	owenm    <owen23355@gmail.com>
 * @license MIT
 */
;(function (global, factory) {
	typeof exports === 'object' && typeof module !== 'undefined'
		? (module.exports = factory())
		: typeof define === 'function' && define.amd
		? define(factory)
		: ((global = global || self), (global.Sortable = factory()))
})(this, function () {
	'use strict'

	function ownKeys(object, enumerableOnly) {
		var keys = Object.keys(object)

		if (Object.getOwnPropertySymbols) {
			var symbols = Object.getOwnPropertySymbols(object)

			if (enumerableOnly) {
				symbols = symbols.filter(function (sym) {
					return Object.getOwnPropertyDescriptor(object, sym).enumerable
				})
			}

			keys.push.apply(keys, symbols)
		}

		return keys
	}

	function _objectSpread2(target) {
		for (var i = 1; i < arguments.length; i++) {
			var source = arguments[i] != null ? arguments[i] : {}

			if (i % 2) {
				ownKeys(Object(source), true).forEach(function (key) {
					_defineProperty(target, key, source[key])
				})
			} else if (Object.getOwnPropertyDescriptors) {
				Object.defineProperties(
					target,
					Object.getOwnPropertyDescriptors(source)
				)
			} else {
				ownKeys(Object(source)).forEach(function (key) {
					Object.defineProperty(
						target,
						key,
						Object.getOwnPropertyDescriptor(source, key)
					)
				})
			}
		}

		return target
	}

	function _typeof(obj) {
		'@babel/helpers - typeof'

		if (typeof Symbol === 'function' && typeof Symbol.iterator === 'symbol') {
			_typeof = function (obj) {
				return typeof obj
			}
		} else {
			_typeof = function (obj) {
				return obj &&
					typeof Symbol === 'function' &&
					obj.constructor === Symbol &&
					obj !== Symbol.prototype
					? 'symbol'
					: typeof obj
			}
		}

		return _typeof(obj)
	}

	function _defineProperty(obj, key, value) {
		if (key in obj) {
			Object.defineProperty(obj, key, {
				value: value,
				enumerable: true,
				configurable: true,
				writable: true
			})
		} else {
			obj[key] = value
		}

		return obj
	}

	function _extends() {
		_extends =
			Object.assign ||
			function (target) {
				for (var i = 1; i < arguments.length; i++) {
					var source = arguments[i]

					for (var key in source) {
						if (Object.prototype.hasOwnProperty.call(source, key)) {
							target[key] = source[key]
						}
					}
				}

				return target
			}

		return _extends.apply(this, arguments)
	}

	function _objectWithoutPropertiesLoose(source, excluded) {
		if (source == null) return {}
		var target = {}
		var sourceKeys = Object.keys(source)
		var key, i

		for (i = 0; i < sourceKeys.length; i++) {
			key = sourceKeys[i]
			if (excluded.indexOf(key) >= 0) continue
			target[key] = source[key]
		}

		return target
	}

	function _objectWithoutProperties(source, excluded) {
		if (source == null) return {}

		var target = _objectWithoutPropertiesLoose(source, excluded)

		var key, i

		if (Object.getOwnPropertySymbols) {
			var sourceSymbolKeys = Object.getOwnPropertySymbols(source)

			for (i = 0; i < sourceSymbolKeys.length; i++) {
				key = sourceSymbolKeys[i]
				if (excluded.indexOf(key) >= 0) continue
				if (!Object.prototype.propertyIsEnumerable.call(source, key)) continue
				target[key] = source[key]
			}
		}

		return target
	}

	function _slicedToArray(arr, i) {
		return (
			_arrayWithHoles(arr) ||
			_iterableToArrayLimit(arr, i) ||
			_unsupportedIterableToArray(arr, i) ||
			_nonIterableRest()
		)
	}

	function _toConsumableArray(arr) {
		return (
			_arrayWithoutHoles(arr) ||
			_iterableToArray(arr) ||
			_unsupportedIterableToArray(arr) ||
			_nonIterableSpread()
		)
	}

	function _arrayWithoutHoles(arr) {
		if (Array.isArray(arr)) return _arrayLikeToArray(arr)
	}

	function _arrayWithHoles(arr) {
		if (Array.isArray(arr)) return arr
	}

	function _iterableToArray(iter) {
		if (
			(typeof Symbol !== 'undefined' && iter[Symbol.iterator] != null) ||
			iter['@@iterator'] != null
		)
			return Array.from(iter)
	}

	function _iterableToArrayLimit(arr, i) {
		var _i =
			arr == null
				? null
				: (typeof Symbol !== 'undefined' && arr[Symbol.iterator]) ||
				  arr['@@iterator']

		if (_i == null) return
		var _arr = []
		var _n = true
		var _d = false

		var _s, _e

		try {
			for (_i = _i.call(arr); !(_n = (_s = _i.next()).done); _n = true) {
				_arr.push(_s.value)

				if (i && _arr.length === i) break
			}
		} catch (err) {
			_d = true
			_e = err
		} finally {
			try {
				if (!_n && _i['return'] != null) _i['return']()
			} finally {
				if (_d) throw _e
			}
		}

		return _arr
	}

	function _unsupportedIterableToArray(o, minLen) {
		if (!o) return
		if (typeof o === 'string') return _arrayLikeToArray(o, minLen)
		var n = Object.prototype.toString.call(o).slice(8, -1)
		if (n === 'Object' && o.constructor) n = o.constructor.name
		if (n === 'Map' || n === 'Set') return Array.from(o)
		if (n === 'Arguments' || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n))
			return _arrayLikeToArray(o, minLen)
	}

	function _arrayLikeToArray(arr, len) {
		if (len == null || len > arr.length) len = arr.length

		for (var i = 0, arr2 = new Array(len); i < len; i++) arr2[i] = arr[i]

		return arr2
	}

	function _nonIterableSpread() {
		throw new TypeError(
			'Invalid attempt to spread non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.'
		)
	}

	function _nonIterableRest() {
		throw new TypeError(
			'Invalid attempt to destructure non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.'
		)
	}

	function _createForOfIteratorHelper(o, allowArrayLike) {
		var it =
			(typeof Symbol !== 'undefined' && o[Symbol.iterator]) || o['@@iterator']

		if (!it) {
			if (
				Array.isArray(o) ||
				(it = _unsupportedIterableToArray(o)) ||
				(allowArrayLike && o && typeof o.length === 'number')
			) {
				if (it) o = it
				var i = 0

				var F = function () {}

				return {
					s: F,
					n: function () {
						if (i >= o.length)
							return {
								done: true
							}
						return {
							done: false,
							value: o[i++]
						}
					},
					e: function (e) {
						throw e
					},
					f: F
				}
			}

			throw new TypeError(
				'Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.'
			)
		}

		var normalCompletion = true,
			didErr = false,
			err
		return {
			s: function () {
				it = it.call(o)
			},
			n: function () {
				var step = it.next()
				normalCompletion = step.done
				return step
			},
			e: function (e) {
				didErr = true
				err = e
			},
			f: function () {
				try {
					if (!normalCompletion && it.return != null) it.return()
				} finally {
					if (didErr) throw err
				}
			}
		}
	}

	var version = '1.15.0'

	function userAgent(pattern) {
		if (typeof window !== 'undefined' && window.navigator) {
			return !!(/*@__PURE__*/ navigator.userAgent.match(pattern))
		}
	}

	var IE11OrLess = userAgent(
		/(?:Trident.*rv[ :]?11\.|msie|iemobile|Windows Phone)/i
	)
	var Edge = userAgent(/Edge/i)
	var FireFox = userAgent(/firefox/i)
	var Safari =
		userAgent(/safari/i) && !userAgent(/chrome/i) && !userAgent(/android/i)
	var IOS = userAgent(/iP(ad|od|hone)/i)
	var ChromeForAndroid = userAgent(/chrome/i) && userAgent(/android/i)

	var captureMode = {
		capture: false,
		passive: false
	}

	function on(el, event, fn) {
		el.addEventListener(event, fn, !IE11OrLess && captureMode)
	}

	function off(el, event, fn) {
		el.removeEventListener(event, fn, !IE11OrLess && captureMode)
	}

	function matches(
		/**HTMLElement*/
		el,
		/**String*/
		selector
	) {
		if (!selector) return
		selector[0] === '>' && (selector = selector.substring(1))

		if (el) {
			try {
				if (el.matches) {
					return el.matches(selector)
				} else if (el.msMatchesSelector) {
					return el.msMatchesSelector(selector)
				} else if (el.webkitMatchesSelector) {
					return el.webkitMatchesSelector(selector)
				}
			} catch (_) {
				return false
			}
		}

		return false
	}

	function getParentOrHost(el) {
		return el.host && el !== document && el.host.nodeType
			? el.host
			: el.parentNode
	}

	function closest(
		/**HTMLElement*/
		el,
		/**String*/
		selector,
		/**HTMLElement*/
		ctx,
		includeCTX
	) {
		if (el) {
			ctx = ctx || document

			do {
				if (
					(selector != null &&
						(selector[0] === '>'
							? el.parentNode === ctx && matches(el, selector)
							: matches(el, selector))) ||
					(includeCTX && el === ctx)
				) {
					return el
				}

				if (el === ctx) break
				/* jshint boss:true */
				// eslint-disable-next-line no-cond-assign
			} while ((el = getParentOrHost(el)))
		}

		return null
	}

	var R_SPACE = /\s+/g

	function toggleClass(el, name, state) {
		if (el && name) {
			if (el.classList) {
				el.classList[state ? 'add' : 'remove'](name)
			} else {
				var className = (' ' + el.className + ' ')
					.replace(R_SPACE, ' ')
					.replace(' ' + name + ' ', ' ')
				el.className = (className + (state ? ' ' + name : '')).replace(
					R_SPACE,
					' '
				)
			}
		}
	}

	function css(el, prop, val) {
		var style = el && el.style

		if (style) {
			if (val === void 0) {
				if (document.defaultView && document.defaultView.getComputedStyle) {
					val = document.defaultView.getComputedStyle(el, '')
				} else if (el.currentStyle) {
					val = el.currentStyle
				}

				return prop === void 0 ? val : val[prop]
			} else {
				if (!(prop in style) && prop.indexOf('webkit') === -1) {
					prop = '-webkit-' + prop
				}

				style[prop] = val + (typeof val === 'string' ? '' : 'px')
			}
		}
	}

	function matrix(el, selfOnly) {
		var appliedTransforms = ''

		if (typeof el === 'string') {
			appliedTransforms = el
		} else {
			do {
				var transform = css(el, 'transform')

				if (transform && transform !== 'none') {
					appliedTransforms = transform + ' ' + appliedTransforms
				}
				/* jshint boss:true */
			} while (!selfOnly && (el = el.parentNode))
		}

		var matrixFn =
			window.DOMMatrix ||
			window.WebKitCSSMatrix ||
			window.CSSMatrix ||
			window.MSCSSMatrix
		/*jshint -W056 */

		return matrixFn && new matrixFn(appliedTransforms)
	}

	function find(ctx, tagName, iterator) {
		if (ctx) {
			var list = ctx.getElementsByTagName(tagName),
				i = 0,
				n = list.length

			if (iterator) {
				for (; i < n; i++) {
					iterator(list[i], i)
				}
			}

			return list
		}

		return []
	}

	function getWindowScrollingElement() {
		var scrollingElement = document.scrollingElement

		if (scrollingElement) {
			return scrollingElement
		} else {
			return document.documentElement
		}
	}
	/**
	 * Returns the "bounding client rect" of given element
	 * @param  {HTMLElement} el                       The element whose boundingClientRect is wanted
	 * @param  {[Boolean]} relativeToContainingBlock  Whether the rect should be relative to the containing block of (including) the container
	 * @param  {[Boolean]} relativeToNonStaticParent  Whether the rect should be relative to the relative parent of (including) the contaienr
	 * @param  {[Boolean]} undoScale                  Whether the container's scale() should be undone
	 * @param  {[HTMLElement]} container              The parent the element will be placed in
	 * @return {Object}                               The boundingClientRect of el, with specified adjustments
	 */

	function getRect(
		el,
		relativeToContainingBlock,
		relativeToNonStaticParent,
		undoScale,
		container
	) {
		if (!el.getBoundingClientRect && el !== window) return
		var elRect, top, left, bottom, right, height, width

		if (el !== window && el.parentNode && el !== getWindowScrollingElement()) {
			elRect = el.getBoundingClientRect()
			top = elRect.top
			left = elRect.left
			bottom = elRect.bottom
			right = elRect.right
			height = elRect.height
			width = elRect.width
		} else {
			top = 0
			left = 0
			bottom = window.innerHeight
			right = window.innerWidth
			height = window.innerHeight
			width = window.innerWidth
		}

		if (
			(relativeToContainingBlock || relativeToNonStaticParent) &&
			el !== window
		) {
			// Adjust for translate()
			container = container || el.parentNode // solves #1123 (see: https://stackoverflow.com/a/37953806/6088312)
			// Not needed on <= IE11

			if (!IE11OrLess) {
				do {
					if (
						container &&
						container.getBoundingClientRect &&
						(css(container, 'transform') !== 'none' ||
							(relativeToNonStaticParent &&
								css(container, 'position') !== 'static'))
					) {
						var containerRect = container.getBoundingClientRect() // Set relative to edges of padding box of container

						top -=
							containerRect.top + parseInt(css(container, 'border-top-width'))
						left -=
							containerRect.left + parseInt(css(container, 'border-left-width'))
						bottom = top + elRect.height
						right = left + elRect.width
						break
					}
					/* jshint boss:true */
				} while ((container = container.parentNode))
			}
		}

		if (undoScale && el !== window) {
			// Adjust for scale()
			var elMatrix = matrix(container || el),
				scaleX = elMatrix && elMatrix.a,
				scaleY = elMatrix && elMatrix.d

			if (elMatrix) {
				top /= scaleY
				left /= scaleX
				width /= scaleX
				height /= scaleY
				bottom = top + height
				right = left + width
			}
		}

		return {
			top: top,
			left: left,
			bottom: bottom,
			right: right,
			width: width,
			height: height
		}
	}
	/**
	 * Gets nth child of el, ignoring hidden children, sortable's elements (does not ignore clone if it's visible)
	 * and non-draggable elements
	 * @param  {HTMLElement} el       The parent element
	 * @param  {Number} childNum      The index of the child
	 * @param  {Object} options       Parent Sortable's options
	 * @return {HTMLElement}          The child at index childNum, or null if not found
	 */

	function getChild(el, childNum, options, includeDragEl) {
		var currentChild = 0,
			i = 0,
			children = el.children

		while (i < children.length) {
			if (
				children[i].style.display !== 'none' &&
				children[i] !== Sortable.ghost &&
				(includeDragEl || children[i] !== Sortable.dragged) &&
				closest(children[i], options.draggable, el, false)
			) {
				if (currentChild === childNum) {
					return children[i]
				}

				currentChild++
			}

			i++
		}

		return null
	}
	/**
	 * Gets the last child in the el, ignoring ghostEl or invisible elements (clones)
	 * @param  {HTMLElement} el       Parent element
	 * @param  {selector} selector    Any other elements that should be ignored
	 * @return {HTMLElement}          The last child, ignoring ghostEl
	 */

	function lastChild(el, selector) {
		var last = el.lastElementChild

		while (
			last &&
			(last === Sortable.ghost ||
				css(last, 'display') === 'none' ||
				(selector && !matches(last, selector)))
		) {
			last = last.previousElementSibling
		}

		return last || null
	}
	/**
	 * Returns the index of an element within its parent for a selected set of
	 * elements
	 * @param  {HTMLElement} el
	 * @param  {selector} selector
	 * @return {number}
	 */

	function index(el, selector) {
		var index = 0

		if (!el || !el.parentNode) {
			return -1
		}
		/* jshint boss:true */

		while ((el = el.previousElementSibling)) {
			if (
				el.nodeName.toUpperCase() !== 'TEMPLATE' &&
				el !== Sortable.clone &&
				(!selector || matches(el, selector))
			) {
				index++
			}
		}

		return index
	}
	/**
	 * Returns the scroll offset of the given element, added with all the scroll offsets of parent elements.
	 * The value is returned in real pixels.
	 * @param  {HTMLElement} el
	 * @return {Array}             Offsets in the format of [left, top]
	 */

	function getRelativeScrollOffset(el) {
		var offsetLeft = 0,
			offsetTop = 0,
			winScroller = getWindowScrollingElement()

		if (el) {
			do {
				var elMatrix = matrix(el),
					scaleX = elMatrix.a,
					scaleY = elMatrix.d
				offsetLeft += el.scrollLeft * scaleX
				offsetTop += el.scrollTop * scaleY
			} while (el !== winScroller && (el = el.parentNode))
		}

		return [offsetLeft, offsetTop]
	}
	/**
	 * Returns the index of the object within the given array
	 * @param  {Array} arr   Array that may or may not hold the object
	 * @param  {Object} obj  An object that has a key-value pair unique to and identical to a key-value pair in the object you want to find
	 * @return {Number}      The index of the object in the array, or -1
	 */

	function indexOfObject(arr, obj) {
		for (var i in arr) {
			// eslint-disable-next-line no-prototype-builtins
			if (!arr.hasOwnProperty(i)) continue

			for (var key in obj) {
				// eslint-disable-next-line no-prototype-builtins
				if (obj.hasOwnProperty(key) && obj[key] === arr[i][key])
					return Number(i)
			}
		}

		return -1
	}

	function getParentAutoScrollElement(el, includeSelf) {
		// skip to window
		if (!el || !el.getBoundingClientRect) return getWindowScrollingElement()
		var elem = el
		var gotSelf = false

		do {
			// we don't need to get elem css if it isn't even overflowing in the first place (performance)
			if (
				elem.clientWidth < elem.scrollWidth ||
				elem.clientHeight < elem.scrollHeight
			) {
				var elemCSS = css(elem)

				if (
					(elem.clientWidth < elem.scrollWidth &&
						(elemCSS.overflowX == 'auto' || elemCSS.overflowX == 'scroll')) ||
					(elem.clientHeight < elem.scrollHeight &&
						(elemCSS.overflowY == 'auto' || elemCSS.overflowY == 'scroll'))
				) {
					if (!elem.getBoundingClientRect || elem === document.body)
						return getWindowScrollingElement()
					if (gotSelf || includeSelf) return elem
					gotSelf = true
				}
			}
			/* jshint boss:true */
		} while ((elem = elem.parentNode))

		return getWindowScrollingElement()
	}

	function extend(dst, src) {
		if (dst && src) {
			for (var key in src) {
				// eslint-disable-next-line no-prototype-builtins
				if (src.hasOwnProperty(key)) {
					dst[key] = src[key]
				}
			}
		}

		return dst
	}

	function isRectEqual(rect1, rect2) {
		return (
			Math.round(rect1.top) === Math.round(rect2.top) &&
			Math.round(rect1.left) === Math.round(rect2.left) &&
			Math.round(rect1.height) === Math.round(rect2.height) &&
			Math.round(rect1.width) === Math.round(rect2.width)
		)
	}

	var _throttleTimeout

	function throttle(callback, ms) {
		return function () {
			if (!_throttleTimeout) {
				var args = arguments,
					// eslint-disable-next-line @typescript-eslint/no-this-alias
					_this = this

				if (args.length === 1) {
					callback.call(_this, args[0])
				} else {
					callback.apply(_this, args)
				}

				_throttleTimeout = setTimeout(function () {
					_throttleTimeout = void 0
				}, ms)
			}
		}
	}

	function cancelThrottle() {
		clearTimeout(_throttleTimeout)
		_throttleTimeout = void 0
	}

	function scrollBy(el, x, y) {
		el.scrollLeft += x
		el.scrollTop += y
	}

	function clone(el) {
		var Polymer = window.Polymer
		var $ = window.jQuery || window.Zepto

		if (Polymer && Polymer.dom) {
			return Polymer.dom(el).cloneNode(true)
		} else if ($) {
			return $(el).clone(true)[0]
		} else {
			return el.cloneNode(true)
		}
	}

	function setRect(el, rect) {
		css(el, 'position', 'absolute')
		css(el, 'top', rect.top)
		css(el, 'left', rect.left)
		css(el, 'width', rect.width)
		css(el, 'height', rect.height)
	}

	function unsetRect(el) {
		css(el, 'position', '')
		css(el, 'top', '')
		css(el, 'left', '')
		css(el, 'width', '')
		css(el, 'height', '')
	}

	var expando = 'Sortable' + new Date().getTime()

	function AnimationStateManager() {
		var animationStates = [],
			animationCallbackId
		return {
			captureAnimationState: function captureAnimationState() {
				animationStates = []
				if (!this.options.animation) return
				var children = [].slice.call(this.el.children)
				children.forEach(function (child) {
					if (css(child, 'display') === 'none' || child === Sortable.ghost)
						return
					animationStates.push({
						target: child,
						rect: getRect(child)
					})

					var fromRect = _objectSpread2(
						{},
						animationStates[animationStates.length - 1].rect
					) // If animating: compensate for current animation

					if (child.thisAnimationDuration) {
						var childMatrix = matrix(child, true)

						if (childMatrix) {
							fromRect.top -= childMatrix.f
							fromRect.left -= childMatrix.e
						}
					}

					child.fromRect = fromRect
				})
			},
			addAnimationState: function addAnimationState(state) {
				animationStates.push(state)
			},
			removeAnimationState: function removeAnimationState(target) {
				animationStates.splice(
					indexOfObject(animationStates, {
						target: target
					}),
					1
				)
			},
			animateAll: function animateAll(callback) {
				var _this = this

				if (!this.options.animation) {
					clearTimeout(animationCallbackId)
					if (typeof callback === 'function') callback()
					return
				}

				var animating = false,
					animationTime = 0
				animationStates.forEach(function (state) {
					var time = 0,
						target = state.target,
						fromRect = target.fromRect,
						toRect = getRect(target),
						prevFromRect = target.prevFromRect,
						prevToRect = target.prevToRect,
						animatingRect = state.rect,
						targetMatrix = matrix(target, true)

					if (targetMatrix) {
						// Compensate for current animation
						toRect.top -= targetMatrix.f
						toRect.left -= targetMatrix.e
					}

					target.toRect = toRect

					if (target.thisAnimationDuration) {
						// Could also check if animatingRect is between fromRect and toRect
						if (
							isRectEqual(prevFromRect, toRect) &&
							!isRectEqual(fromRect, toRect) && // Make sure animatingRect is on line between toRect & fromRect
							(animatingRect.top - toRect.top) /
								(animatingRect.left - toRect.left) ===
								(fromRect.top - toRect.top) / (fromRect.left - toRect.left)
						) {
							// If returning to same place as started from animation and on same axis
							time = calculateRealTime(
								animatingRect,
								prevFromRect,
								prevToRect,
								_this.options
							)
						}
					} // if fromRect != toRect: animate

					if (!isRectEqual(toRect, fromRect)) {
						target.prevFromRect = fromRect
						target.prevToRect = toRect

						if (!time) {
							time = _this.options.animation
						}

						_this.animate(target, animatingRect, toRect, time)
					}

					if (time) {
						animating = true
						animationTime = Math.max(animationTime, time)
						clearTimeout(target.animationResetTimer)
						target.animationResetTimer = setTimeout(function () {
							target.animationTime = 0
							target.prevFromRect = null
							target.fromRect = null
							target.prevToRect = null
							target.thisAnimationDuration = null
						}, time)
						target.thisAnimationDuration = time
					}
				})
				clearTimeout(animationCallbackId)

				if (!animating) {
					if (typeof callback === 'function') callback()
				} else {
					animationCallbackId = setTimeout(function () {
						if (typeof callback === 'function') callback()
					}, animationTime)
				}

				animationStates = []
			},
			animate: function animate(target, currentRect, toRect, duration) {
				if (duration) {
					css(target, 'transition', '')
					css(target, 'transform', '')
					var elMatrix = matrix(this.el),
						scaleX = elMatrix && elMatrix.a,
						scaleY = elMatrix && elMatrix.d,
						translateX = (currentRect.left - toRect.left) / (scaleX || 1),
						translateY = (currentRect.top - toRect.top) / (scaleY || 1)
					target.animatingX = !!translateX
					target.animatingY = !!translateY
					css(
						target,
						'transform',
						'translate3d(' + translateX + 'px,' + translateY + 'px,0)'
					)
					this.forRepaintDummy = repaint(target) // repaint

					css(
						target,
						'transition',
						'transform ' +
							duration +
							'ms' +
							(this.options.easing ? ' ' + this.options.easing : '')
					)
					css(target, 'transform', 'translate3d(0,0,0)')
					typeof target.animated === 'number' && clearTimeout(target.animated)
					target.animated = setTimeout(function () {
						css(target, 'transition', '')
						css(target, 'transform', '')
						target.animated = false
						target.animatingX = false
						target.animatingY = false
					}, duration)
				}
			}
		}
	}

	function repaint(target) {
		return target.offsetWidth
	}

	function calculateRealTime(animatingRect, fromRect, toRect, options) {
		return (
			(Math.sqrt(
				Math.pow(fromRect.top - animatingRect.top, 2) +
					Math.pow(fromRect.left - animatingRect.left, 2)
			) /
				Math.sqrt(
					Math.pow(fromRect.top - toRect.top, 2) +
						Math.pow(fromRect.left - toRect.left, 2)
				)) *
			options.animation
		)
	}

	var plugins = []
	var defaults = {
		initializeByDefault: true
	}
	var PluginManager = {
		mount: function mount(plugin) {
			// Set default static properties
			for (var option in defaults) {
				if (defaults.hasOwnProperty(option) && !(option in plugin)) {
					plugin[option] = defaults[option]
				}
			}

			plugins.forEach(function (p) {
				if (p.pluginName === plugin.pluginName) {
					throw 'Sortable: Cannot mount plugin '.concat(
						plugin.pluginName,
						' more than once'
					)
				}
			})
			plugins.push(plugin)
		},
		pluginEvent: function pluginEvent(eventName, sortable, evt) {
			var _this = this

			this.eventCanceled = false

			evt.cancel = function () {
				_this.eventCanceled = true
			}

			var eventNameGlobal = eventName + 'Global'
			plugins.forEach(function (plugin) {
				if (!sortable[plugin.pluginName]) return // Fire global events if it exists in this sortable

				if (sortable[plugin.pluginName][eventNameGlobal]) {
					sortable[plugin.pluginName][eventNameGlobal](
						_objectSpread2(
							{
								sortable: sortable
							},
							evt
						)
					)
				} // Only fire plugin event if plugin is enabled in this sortable,
				// and plugin has event defined

				if (
					sortable.options[plugin.pluginName] &&
					sortable[plugin.pluginName][eventName]
				) {
					sortable[plugin.pluginName][eventName](
						_objectSpread2(
							{
								sortable: sortable
							},
							evt
						)
					)
				}
			})
		},
		initializePlugins: function initializePlugins(
			sortable,
			el,
			defaults,
			options
		) {
			plugins.forEach(function (plugin) {
				var pluginName = plugin.pluginName
				if (!sortable.options[pluginName] && !plugin.initializeByDefault) return
				var initialized = new plugin(sortable, el, sortable.options)
				initialized.sortable = sortable
				initialized.options = sortable.options
				sortable[pluginName] = initialized // Add default options from plugin

				_extends(defaults, initialized.defaults)
			})

			for (var option in sortable.options) {
				if (!sortable.options.hasOwnProperty(option)) continue
				var modified = this.modifyOption(
					sortable,
					option,
					sortable.options[option]
				)

				if (typeof modified !== 'undefined') {
					sortable.options[option] = modified
				}
			}
		},
		getEventProperties: function getEventProperties(name, sortable) {
			var eventProperties = {}
			plugins.forEach(function (plugin) {
				if (typeof plugin.eventProperties !== 'function') return

				_extends(
					eventProperties,
					plugin.eventProperties.call(sortable[plugin.pluginName], name)
				)
			})
			return eventProperties
		},
		modifyOption: function modifyOption(sortable, name, value) {
			var modifiedValue
			plugins.forEach(function (plugin) {
				// Plugin must exist on the Sortable
				if (!sortable[plugin.pluginName]) return // If static option listener exists for this option, call in the context of the Sortable's instance of this plugin

				if (
					plugin.optionListeners &&
					typeof plugin.optionListeners[name] === 'function'
				) {
					modifiedValue = plugin.optionListeners[name].call(
						sortable[plugin.pluginName],
						value
					)
				}
			})
			return modifiedValue
		}
	}

	function dispatchEvent(_ref) {
		var sortable = _ref.sortable,
			rootEl = _ref.rootEl,
			name = _ref.name,
			targetEl = _ref.targetEl,
			cloneEl = _ref.cloneEl,
			toEl = _ref.toEl,
			fromEl = _ref.fromEl,
			oldIndex = _ref.oldIndex,
			newIndex = _ref.newIndex,
			oldDraggableIndex = _ref.oldDraggableIndex,
			newDraggableIndex = _ref.newDraggableIndex,
			originalEvent = _ref.originalEvent,
			putSortable = _ref.putSortable,
			extraEventProperties = _ref.extraEventProperties,
			swapDoms = _ref.swapDoms,
			maxDom = _ref.maxDom,
			indexes = _ref.indexes
		sortable = sortable || (rootEl && rootEl[expando])
		if (!sortable) return
		var evt,
			options = sortable.options,
			onName = 'on' + name.charAt(0).toUpperCase() + name.substr(1) // Support for new CustomEvent feature

		if (window.CustomEvent && !IE11OrLess && !Edge) {
			evt = new CustomEvent(name, {
				bubbles: true,
				cancelable: true
			})
		} else {
			evt = document.createEvent('Event')
			evt.initEvent(name, true, true)
		}

		evt.to = toEl || rootEl
		evt.from = fromEl || rootEl
		evt.item = targetEl || rootEl
		evt.clone = cloneEl
		evt.oldIndex = oldIndex
		evt.newIndex = newIndex
		evt.oldDraggableIndex = oldDraggableIndex
		evt.newDraggableIndex = newDraggableIndex
		evt.originalEvent = originalEvent
		evt.pullMode = putSortable ? putSortable.lastPutMode : undefined

		var allEventProperties = _objectSpread2(
			_objectSpread2({}, extraEventProperties),
			PluginManager.getEventProperties(name, sortable)
		)

		for (var option in allEventProperties) {
			evt[option] = allEventProperties[option]
		}

		if (name === 'customSwap') {
			evt.swapDoms = swapDoms
			evt.maxDom = maxDom
			evt.indexes = indexes
		}

		if (rootEl) {
			rootEl.dispatchEvent(evt)
		}

		if (options[onName]) {
			options[onName].call(sortable, evt)
		}
	}

	var sortableInstanceOptions

	var initSortableThis = function initSortableThis(options) {
		sortableInstanceOptions = options
	}
	/**
	 * 获取dom所在的位置
	 * @param {Element} dom
	 * @param key
	 * @returns {number[][]} [[1,2],[1,3]]
	 */

	var getPosition = function getPosition(dom) {
		return sortableInstanceOptions.utils.getPosition(dom) // if (!isDomElement(dom)) return null
		// const pos = dom.getAttribute(key)
		// return pos ? JSON.parse(pos) : null
	}
	/**
	 *
	 * @param {Element} dragEl 拖元素的dom
	 * @param {Element} dropEl 放元素的dom
	 * @returns {String} 拖拽的方向
	 */

	var getDirection = function getDirection(dragEl, dropEl) {
		var dragPosition = getPosition(dragEl)
		var dropPosition = getPosition(dropEl)
		if (!dragPosition || !dropPosition) return 'horizontal'

		var dragHorizontalPos = _toConsumableArray(
			new Set(
				dragPosition.map(function (pos) {
					return pos[0]
				})
			)
		)

		var dropHorizontalPos = _toConsumableArray(
			new Set(
				dropPosition.map(function (pos) {
					return pos[0]
				})
			)
		)

		return dragHorizontalPos[0] !== dropHorizontalPos[0]
			? combineArray(dragHorizontalPos, dropHorizontalPos)
			: 'horizontal'

		function combineArray(arr1, arr2, arr11, arr22) {
			var groupArray = [
				[0, 1],
				[2, 3],
				[4, 5]
			]
			var groupMap = {}

			for (
				var _i = 0, _groupArray = groupArray;
				_i < _groupArray.length;
				_i++
			) {
				var group = _groupArray[_i]

				var _iterator = _createForOfIteratorHelper(group),
					_step

				try {
					for (_iterator.s(); !(_step = _iterator.n()).done; ) {
						var num = _step.value
						groupMap[num] = group
					}
				} catch (err) {
					_iterator.e(err)
				} finally {
					_iterator.f()
				}
			}

			var groupOfArr1 = findGroup(arr1)
			var groupOfArr2 = findGroup(arr2)
			var commonValues = [
				arr1.filter(function (value) {
					return arr2.includes(value)
				})
			].sort()

			if (!areArraysEqual(groupOfArr1, groupOfArr2)) {
				// console.log('arr1, arr2', arr11, arr22)
				// 还差纵向斜着拖拽
				return 'vertical-across-rows'
			} else {
				if (commonValues.length > 0 && commonValues[0].length > 0) {
					if (arr1.length === 1 && arr1[0] % 2 === 1) {
						return 'vertical-drag'
					}

					if (arr2.length === 1 && arr2[0] % 2 === 1) {
						return 'vertical-drop'
					}
				}

				return 'vertical'
			}

			function findGroup(arr) {
				var _iterator2 = _createForOfIteratorHelper(arr),
					_step2

				try {
					for (_iterator2.s(); !(_step2 = _iterator2.n()).done; ) {
						var _num = _step2.value

						if (groupMap[_num]) {
							return groupMap[_num]
						}
					}
				} catch (err) {
					_iterator2.e(err)
				} finally {
					_iterator2.f()
				}

				return null
			}
		}
	}
	/**
	 *
	 * @param {number[][]} arr1 [1,2]
	 * @param {number[][]} arr2 [2,1]
	 * @returns {Boolean}
	 */

	function areArraysEqual(arr1, arr2) {
		return sortableInstanceOptions.utils.areArraysEqual(arr1, arr2)
	}

	function getElement(el) {
		var dragPos = getPosition(el)
		var eventPos = dragPos.map(function (v) {
			return [v[0] - 1, v[1]]
		}) // console.log('eventPos', eventPos)

		for (var i = 0; i < el.parentNode.children.length; i++) {
			if (areArraysEqual(eventPos, getPosition(el.parentNode.children[i]))) {
				return el.parentNode.children[i]
			}
		}
	}

	function fillArray(fromPos, toPos, from, to) {
		// console.log('fromPos, toPos', fromPos, toPos, from, to)
		if (fromPos.length === 0 || toPos.length === 0) {
			return null
		}

		var utils = sortableInstanceOptions.utils
		var getSize = utils.getSize
		var getRootVars = utils.getRootVars // let i = 0

		var maxPosDom = fromPos.length > toPos.length ? from : to
		var minPosDom = fromPos.length > toPos.length ? to : from
		var maxData = getSize(index(maxPosDom))

		var _utils$getRowAndCol = utils.getRowAndCol(maxData.widgetSize),
			_utils$getRowAndCol2 = _slicedToArray(_utils$getRowAndCol, 2),
			rows = _utils$getRowAndCol2[0],
			cols = _utils$getRowAndCol2[1]

		var minData = getSize(index(minPosDom))

		var _ref =
				minData.fill[0][0] % 2 === 1
					? [minData.fill[0][0] - 1, minData.fill[0][1]]
					: minData.fill[0],
			_ref2 = _slicedToArray(_ref, 2),
			row = _ref2[0],
			col = _ref2[1]

		if (col + cols > getRootVars.iconCol) {
			// console.log('不满足往后找')
			col = getRootVars.iconCol - cols
		} // while (fromPos.length !== toPos.length && i < 1) {

		var doms = {
			odd: [],
			even: []
		}
		var indexes = {
			min: {
				odd: [],
				even: []
			},
			max: []
		}
		indexes.max.push(index(maxPosDom))

		for (var i = 0; i < rows; i++) {
			for (var j = 0; j < cols; j++) {
				var blockRow = row + i
				var blockCol = col + j
				var dom = getElementbyPos(to, [blockRow, blockCol])

				if (!doms.odd.includes(dom) && !doms.even.includes(dom)) {
					if (blockRow % 2 === 0) {
						doms.odd.push(dom)
						indexes.min.odd.push(index(dom))
					} else {
						doms.even.push(dom)
						indexes.min.even.push(index(dom))
					}
				}
			}
		}

		return {
			doms: doms,
			maxPosDom: maxPosDom,
			indexes: indexes
		}
	}

	function getElementbyPos(toEl, pos) {
		var childrens = Array.from(toEl.parentNode.children)
		var dom = childrens.find(function (el) {
			return getPosition(el).some(function (vpos) {
				return vpos[0] === pos[0] && vpos[1] === pos[1]
			})
		})
		return dom ? dom : null
	}

	var lastSwapEl

	function SwapPlugin() {
		// console.log('触发交换组件挂载')

		function Swap() {
			this.defaults = {
				swapClass: 'sortable-swap-highlight'
			}
		}

		Swap.prototype = {
			dragStart: function dragStart(_ref) {
				var dragEl = _ref.dragEl
				// console.log('开始拖拽, 交换组件逻辑触发', dragEl)
				lastSwapEl = dragEl
			},
			dragOverValid: function dragOverValid(_ref2) {
				var completed = _ref2.completed,
					target = _ref2.target,
					onMove = _ref2.onMove,
					activeSortable = _ref2.activeSortable,
					changed = _ref2.changed,
					cancel = _ref2.cancel
				if (!activeSortable.options.swap) return
				var el = this.sortable.el,
					options = this.options

				if (target && target !== el) {
					var prevSwapEl = lastSwapEl

					if (onMove(target) !== false) {
						toggleClass(target, options.swapClass, true)
						lastSwapEl = target
					} else {
						lastSwapEl = null
					}

					if (prevSwapEl && prevSwapEl !== lastSwapEl) {
						toggleClass(prevSwapEl, options.swapClass, false)
					}
				}

				changed()
				completed(true)
				cancel()
			},
			drop: function drop(_ref3) {
				var activeSortable = _ref3.activeSortable,
					putSortable = _ref3.putSortable,
					dragEl = _ref3.dragEl
				// console.log('松手了')
				var toSortable = putSortable || this.sortable
				var options = this.options
				lastSwapEl && toggleClass(lastSwapEl, options.swapClass, false)

				if (
					lastSwapEl &&
					(options.swap || (putSortable && putSortable.options.swap))
				) {
					if (dragEl !== lastSwapEl) {
						toSortable.captureAnimationState()
						// console.log('toSortable', toSortable)
						// console.log('activeSortable', activeSortable)
						// console.log('activeSortable', toSortable !== activeSortable)
						if (toSortable !== activeSortable)
							activeSortable.captureAnimationState()
						swapNodes(dragEl, lastSwapEl)
						toSortable.animateAll()
						if (toSortable !== activeSortable) activeSortable.animateAll()
					}
				}
			},
			nulling: function nulling() {
				lastSwapEl = null
			}
		}
		return _extends(Swap, {
			pluginName: 'swap',
			eventProperties: function eventProperties() {
				return {
					swapItem: lastSwapEl
				}
			}
		})
	}

	function swapNodes(n1, n2) {
		var p1 = n1.parentNode,
			p2 = n2.parentNode,
			i1,
			i2
		if (!p1 || !p2 || p1.isEqualNode(n2) || p2.isEqualNode(n1)) return
		i1 = index(n1)
		i2 = index(n2)

		if (p1.isEqualNode(p2) && i1 < i2) {
			i2++
		}

		p1.insertBefore(n2, p1.children[i1])
		p2.insertBefore(n1, p2.children[i2])
	}

	var _excluded = ['evt']

	var pluginEvent = function pluginEvent(eventName, sortable) {
		var _ref =
				arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {},
			originalEvent = _ref.evt,
			data = _objectWithoutProperties(_ref, _excluded)

		PluginManager.pluginEvent.bind(Sortable)(
			eventName,
			sortable,
			_objectSpread2(
				{
					dragEl: dragEl,
					parentEl: parentEl,
					ghostEl: ghostEl,
					rootEl: rootEl,
					nextEl: nextEl,
					lastDownEl: lastDownEl,
					cloneEl: cloneEl,
					cloneHidden: cloneHidden,
					dragStarted: moved,
					putSortable: putSortable,
					activeSortable: Sortable.active,
					originalEvent: originalEvent,
					oldIndex: oldIndex,
					oldDraggableIndex: oldDraggableIndex,
					newIndex: newIndex,
					newDraggableIndex: newDraggableIndex,
					hideGhostForTarget: _hideGhostForTarget,
					unhideGhostForTarget: _unhideGhostForTarget,
					cloneNowHidden: function cloneNowHidden() {
						cloneHidden = true
					},
					cloneNowShown: function cloneNowShown() {
						cloneHidden = false
					},
					dispatchSortableEvent: function dispatchSortableEvent(name) {
						_dispatchEvent({
							sortable: sortable,
							name: name,
							originalEvent: originalEvent
						})
					}
				},
				data
			)
		)
	} // _dispatchEvent 会通过 new window.CustomEvent 构造一个事件对象，将拖拽元素的信息添加到自定义事件对象上，传递给外部的注册事件函数

	function _dispatchEvent(info) {
		// if (oldIndex === undefined || newIndex === undefined) return
		dispatchEvent(
			_objectSpread2(
				{
					putSortable: putSortable,
					cloneEl: cloneEl,
					targetEl: dragEl,
					rootEl: rootEl,
					oldIndex: oldIndex,
					oldDraggableIndex: oldDraggableIndex,
					newIndex: newIndex,
					newDraggableIndex: newDraggableIndex
				},
				info
			)
		)
	}

	var dragEl,
		parentEl,
		ghostEl,
		rootEl,
		nextEl,
		lastDownEl,
		cloneEl,
		cloneHidden,
		oldIndex,
		newIndex,
		oldDraggableIndex,
		newDraggableIndex,
		activeGroup,
		putSortable,
		awaitingDragStarted = false,
		ignoreNextClick = false,
		sortables = [],
		tapEvt,
		touchEvt,
		lastDx,
		lastDy,
		tapDistanceLeft,
		tapDistanceTop,
		moved,
		lastTarget,
		lastDirection,
		// For positioning ghost absolutely
		ghostRelativeParent,
		ghostRelativeParentInitialScroll = [],
		// (left, top)
		_silent = false,
		savedInputChecked = [],
		// 最后一个交换的元素
		lastSwapEl$1
	var lastExecutionTime = 0 // 交换灵敏度

	var MAX_TRIGGER_TIME = 150

	function createVariableCache() {
		var cachedVariables = {
			dragging: false
		} // 用于缓存变量的对象
		// 返回一个函数，用于设置和获取缓存的变量

		return {
			set: function set(key, value) {
				cachedVariables[key] = value
			},
			get: function get(key) {
				return key ? cachedVariables[key] : cachedVariables
			},
			clear: function clear() {
				cachedVariables = {}
			}
		}
	}

	var cacheVar = createVariableCache()
	var ISDEV = sessionStorage.getItem('ISDEV')
	/** @const */

	var documentExists = typeof document !== 'undefined',
		PositionGhostAbsolutely = IOS,
		CSSFloatProperty = Edge || IE11OrLess ? 'cssFloat' : 'float',
		// This will not pass for IE9, because IE9 DnD only works on anchors
		supportDraggable =
			documentExists &&
			!ChromeForAndroid &&
			!IOS &&
			'draggable' in document.createElement('div'),
		supportCssPointerEvents = (function () {
			if (!documentExists) return // false when <= IE11

			if (IE11OrLess) {
				return false
			}

			var el = document.createElement('x')
			el.style.cssText = 'pointer-events:auto'
			return el.style.pointerEvents === 'auto'
		})(),
		_detectDirection = function _detectDirection(el, options) {
			var elCSS = css(el),
				elWidth =
					parseInt(elCSS.width) -
					parseInt(elCSS.paddingLeft) -
					parseInt(elCSS.paddingRight) -
					parseInt(elCSS.borderLeftWidth) -
					parseInt(elCSS.borderRightWidth),
				child1 = getChild(el, 0, options),
				child2 = getChild(el, 1, options),
				firstChildCSS = child1 && css(child1),
				secondChildCSS = child2 && css(child2),
				firstChildWidth =
					firstChildCSS &&
					parseInt(firstChildCSS.marginLeft) +
						parseInt(firstChildCSS.marginRight) +
						getRect(child1).width,
				secondChildWidth =
					secondChildCSS &&
					parseInt(secondChildCSS.marginLeft) +
						parseInt(secondChildCSS.marginRight) +
						getRect(child2).width

			if (elCSS.display === 'flex') {
				return elCSS.flexDirection === 'column' ||
					elCSS.flexDirection === 'column-reverse'
					? 'vertical'
					: 'horizontal'
			}

			if (elCSS.display === 'grid') {
				return elCSS.gridTemplateColumns.split(' ').length <= 1
					? 'vertical'
					: 'horizontal'
			}

			if (
				child1 &&
				firstChildCSS['float'] &&
				firstChildCSS['float'] !== 'none'
			) {
				var touchingSideChild2 =
					firstChildCSS['float'] === 'left' ? 'left' : 'right'
				return child2 &&
					(secondChildCSS.clear === 'both' ||
						secondChildCSS.clear === touchingSideChild2)
					? 'vertical'
					: 'horizontal'
			}

			return child1 &&
				(firstChildCSS.display === 'block' ||
					firstChildCSS.display === 'flex' ||
					firstChildCSS.display === 'table' ||
					firstChildCSS.display === 'grid' ||
					(firstChildWidth >= elWidth && elCSS[CSSFloatProperty] === 'none') ||
					(child2 &&
						elCSS[CSSFloatProperty] === 'none' &&
						firstChildWidth + secondChildWidth > elWidth))
				? 'vertical'
				: 'horizontal'
		},
		/**
		 * Detects first nearest empty sortable to X and Y position using emptyInsertThreshold.
		 * @param  {Number} x      X position
		 * @param  {Number} y      Y position
		 * @return {HTMLElement}   Element of the first found nearest Sortable
		 */
		_detectNearestEmptySortable = function _detectNearestEmptySortable(x, y) {
			var ret
			sortables.some(function (sortable) {
				var threshold = sortable[expando].options.emptyInsertThreshold
				if (!threshold || lastChild(sortable)) return
				var rect = getRect(sortable),
					insideHorizontally =
						x >= rect.left - threshold && x <= rect.right + threshold,
					insideVertically =
						y >= rect.top - threshold && y <= rect.bottom + threshold

				if (insideHorizontally && insideVertically) {
					return (ret = sortable)
				}
			})
			return ret
		},
		_prepareGroup = function _prepareGroup(options) {
			function toFn(value, pull) {
				return function (to, from, dragEl, evt) {
					var sameGroup =
						to.options.group.name &&
						from.options.group.name &&
						to.options.group.name === from.options.group.name

					if (value == null && (pull || sameGroup)) {
						// Default pull value
						// Default pull and put value if same group
						return true
					} else if (value == null || value === false) {
						return false
					} else if (pull && value === 'clone') {
						return value
					} else if (typeof value === 'function') {
						return toFn(value(to, from, dragEl, evt), pull)(
							to,
							from,
							dragEl,
							evt
						)
					} else {
						var otherGroup = (pull ? to : from).options.group.name
						return (
							value === true ||
							(typeof value === 'string' && value === otherGroup) ||
							(value.join && value.indexOf(otherGroup) > -1)
						)
					}
				}
			}

			var group = {}
			var originalGroup = options.group

			if (!originalGroup || _typeof(originalGroup) != 'object') {
				originalGroup = {
					name: originalGroup
				}
			}

			group.name = originalGroup.name
			group.checkPull = toFn(originalGroup.pull, true)
			group.checkPut = toFn(originalGroup.put)
			group.revertClone = originalGroup.revertClone
			options.group = group
		},
		_hideGhostForTarget = function _hideGhostForTarget() {
			if (!supportCssPointerEvents && ghostEl) {
				css(ghostEl, 'display', 'none')
			}
		},
		_unhideGhostForTarget = function _unhideGhostForTarget() {
			if (!supportCssPointerEvents && ghostEl) {
				css(ghostEl, 'display', '')
			}
		} // #1184 fix - Prevent click event on fallback if dragged but item not changed position

	if (documentExists && !ChromeForAndroid) {
		document.addEventListener(
			'click',
			function (evt) {
				if (ignoreNextClick) {
					evt.preventDefault()
					evt.stopPropagation && evt.stopPropagation()
					evt.stopImmediatePropagation && evt.stopImmediatePropagation()
					ignoreNextClick = false
					return false
				}
			},
			true
		)
	}

	var nearestEmptyInsertDetectEvent = function nearestEmptyInsertDetectEvent(
		evt
	) {
		if (dragEl) {
			evt = evt.touches ? evt.touches[0] : evt // 传入鼠标在窗口内所在的位置

			var nearest = _detectNearestEmptySortable(evt.clientX, evt.clientY)

			if (nearest) {
				// Create imitation event
				var event = {}

				for (var i in evt) {
					if (evt.hasOwnProperty(i)) {
						event[i] = evt[i]
					}
				}

				event.target = event.rootEl = nearest
				event.preventDefault = void 0
				event.stopPropagation = void 0

				nearest[expando]._onDragOver(event)
			}
		}
	}

	var _checkOutsideTargetEl = function _checkOutsideTargetEl(evt) {
		if (dragEl) {
			dragEl.parentNode[expando]._isOutsideThisEl(evt.target)
		}
	}
	/**
	 * @class  Sortable
	 * @param  {HTMLElement}  el
	 * @param  {Object}       [options]
	 */

	function Sortable(el, options) {
		if (!(el && el.nodeType && el.nodeType === 1)) {
			throw 'Sortable: `el` must be an HTMLElement, not '.concat(
				{}.toString.call(el)
			)
		}

		this.el = el // root element

		this.options = options = _extends({}, options)
		initSortableThis(this.options) // Export instance

		el[expando] = this
		var defaults = {
			group: null,
			sort: true,
			disabled: false,
			store: null,
			handle: null,
			draggable: /^[uo]l$/i.test(el.nodeName) ? '>li' : '>*',
			swapThreshold: 1,
			// percentage; 0 <= x <= 1
			invertSwap: false,
			// invert always
			invertedSwapThreshold: null,
			// will be set to same as swapThreshold if default
			removeCloneOnHide: true,
			direction: function direction() {
				return _detectDirection(el, this.options)
			},
			ghostClass: 'sortable-ghost',
			chosenClass: 'sortable-chosen',
			dragClass: 'sortable-drag',
			ignore: 'a, img',
			filter: null,
			preventOnFilter: true,
			animation: 0,
			easing: null,
			setData: function setData(dataTransfer, dragEl) {
				dataTransfer.setData('Text', dragEl.textContent)
			},
			dropBubble: false,
			dragoverBubble: false,
			dataIdAttr: 'data-id',
			delay: 0,
			delayOnTouchOnly: false,
			touchStartThreshold:
				(Number.parseInt ? Number : window).parseInt(
					window.devicePixelRatio,
					10
				) || 1,
			forceFallback: false,
			fallbackClass: 'sortable-fallback',
			fallbackOnBody: false,
			fallbackTolerance: 0,
			fallbackOffset: {
				x: 0,
				y: 0
			},
			supportPointer:
				Sortable.supportPointer !== false &&
				'PointerEvent' in window &&
				!Safari,
			emptyInsertThreshold: 5
		}
		PluginManager.initializePlugins(this, el, defaults) // Set default options

		for (var name in defaults) {
			!(name in options) && (options[name] = defaults[name])
		}

		_prepareGroup(options) // Bind all private methods

		for (var fn in this) {
			if (fn.charAt(0) === '_' && typeof this[fn] === 'function') {
				this[fn] = this[fn].bind(this)
			}
		} // Setup drag mode

		this.nativeDraggable = options.forceFallback ? false : supportDraggable

		if (this.nativeDraggable) {
			// Touch start threshold cannot be greater than the native dragstart threshold
			this.options.touchStartThreshold = 1
		} // Bind events

		if (options.supportPointer) {
			on(el, 'pointerdown', this._onTapStart)
		} else {
			on(el, 'mousedown', this._onTapStart)
			on(el, 'touchstart', this._onTapStart)
		}

		if (this.nativeDraggable) {
			on(el, 'dragover', this)
			on(el, 'dragenter', this)
		}

		sortables.push(this.el) // Restore sorting

		options.store &&
			options.store.get &&
			this.sort(options.store.get(this) || []) // Add animation state manager

		_extends(this, AnimationStateManager())
	}

	Sortable.prototype =
		/** @lends Sortable.prototype */
		{
			constructor: Sortable,
			_isOutsideThisEl: function _isOutsideThisEl(target) {
				if (!this.el.contains(target) && target !== this.el) {
					lastTarget = null
				}
			},
			_getDirection: function _getDirection(evt, target) {
				return typeof this.options.direction === 'function'
					? this.options.direction.call(this, evt, target, dragEl)
					: this.options.direction
			},
			// 开始拖拽准备事件
			_onTapStart: function _onTapStart(
				/** Event|TouchEvent */
				evt
			) {
				if (!evt.cancelable) return

				var _this = this,
					el = this.el,
					options = this.options,
					preventOnFilter = options.preventOnFilter,
					type = evt.type,
					touch =
						(evt.touches && evt.touches[0]) ||
						(evt.pointerType && evt.pointerType === 'touch' && evt),
					target = (touch || evt).target,
					originalTarget =
						(evt.target.shadowRoot &&
							((evt.path && evt.path[0]) ||
								(evt.composedPath && evt.composedPath()[0]))) ||
						target,
					filter = options.filter // 包含 custom-disabled-class

				if (
					closest(evt.target, options.draggable, el, false) &&
					closest(evt.target, options.draggable, el, false).classList.contains(
						options.customDisabledClass
					)
				) {
					return
				} // 保存拖拽输入框内的状态

				_saveInputCheckedState(el) // Don't trigger start event when an element is been dragged, otherwise the evt.oldindex always wrong when set option.group.

				if (dragEl) {
					return
				}

				if (
					(/mousedown|pointerdown/.test(type) && evt.button !== 0) ||
					options.disabled
				) {
					return // only left button and enabled
				} // cancel dnd if original target is content editable

				if (originalTarget.isContentEditable) {
					return
				} // Safari ignores further event handling after mousedown

				if (
					!this.nativeDraggable &&
					Safari &&
					target &&
					target.tagName.toUpperCase() === 'SELECT'
				) {
					return
				}

				target = closest(target, options.draggable, el, false)

				if (target && target.animated) {
					return
				} // 避免重复按下

				if (lastDownEl === target) {
					// Ignoring duplicate `down`
					return
				} // Get the index of the dragged element within its parent
				// 获取被拖动元素在其父元素中的索引

				oldIndex = index(target)
				oldDraggableIndex = index(target, options.draggable)

				if (!cacheVar.get('dragging')) {
					cacheVar.set('oldIndex', oldIndex)
					cacheVar.set('oldDraggableIndex', oldDraggableIndex)
				} // Check filter
				// ---------------------------暂时用不到不需要看------------------------------

				if (typeof filter === 'function') {
					if (filter.call(this, evt, target, this)) {
						_dispatchEvent({
							sortable: _this,
							rootEl: originalTarget,
							name: 'filter',
							targetEl: target,
							toEl: el,
							fromEl: el
						})

						pluginEvent('filter', _this, {
							evt: evt
						})
						preventOnFilter && evt.cancelable && evt.preventDefault()
						return // cancel dnd
					}
				} else if (filter) {
					filter = filter.split(',').some(function (criteria) {
						criteria = closest(originalTarget, criteria.trim(), el, false)

						if (criteria) {
							_dispatchEvent({
								sortable: _this,
								rootEl: criteria,
								name: 'filter',
								targetEl: target,
								fromEl: el,
								toEl: el
							})

							pluginEvent('filter', _this, {
								evt: evt
							})
							return true
						}
					})

					if (filter) {
						preventOnFilter && evt.cancelable && evt.preventDefault()
						return // cancel dnd
					}
				} // ---------------------------暂时用不到不需要看------------------------------
				// 如果设置了句柄但是按下的不是句柄位置

				if (
					options.handle &&
					!closest(originalTarget, options.handle, el, false)
				) {
					return
				} // Prepare `dragstart`
				// 准备拖拽

				this._prepareDragStart(evt, touch, target)
			},
			// 上面_onTapStart将所有参数整理出来之后将拖拽的PointerEvent和目标对象dom传入
			_prepareDragStart: function _prepareDragStart(
				/** Event */
				evt,
				/** Touch */
				touch,
				/** HTMLElement */
				target
			) {
				var _this = this,
					el = _this.el,
					options = _this.options,
					ownerDocument = el.ownerDocument,
					dragStartFn
				/**
				 * target 拖拽对象
				 * dragEl 拖拽的dom
				 * |               target && !dragEl && (target.parentNode === el)                    |
				 * | 如果 拖拽对象存在  并且  dragEl不存在 并且 拖拽对象的父节点全等于拖拽的容器 grid-layout  |
				 */

				if (target && !dragEl && target.parentNode === el) {
					/*
					 * this 整个Sortable对象, 包含所有的函数和参数
					 * el 拖拽的容器 grid-layout
					 * options 传入的所有参数
					 * ownerDocument 当前容器位于的整个文档 document
					 * dragStartFn 初始化的开始拖拽函数
					 * */
					// 拿到拖拽对象的大小及其相对于[视口Viewport]的位置
					var dragRect = getRect(target) // 将拖拽的容器赋值给全局变量「rootEl」

					rootEl = el // 将拖拽元素dom赋值给全局变量「dragEl」

					dragEl = target // 将拖拽元素的父节点赋值给全局变量 「parentEl」

					parentEl = dragEl.parentNode // 将拖拽元素的下一个节点赋值给全局变量 「nexEl」

					nextEl = dragEl.nextSibling // 最后按下的元素

					lastDownEl = target
					activeGroup = options.group // 将正在拖拽的元素赋值给Sortable.dragged变量

					Sortable.dragged = dragEl
					tapEvt = {
						target: dragEl,
						clientX: (touch || evt).clientX,
						clientY: (touch || evt).clientY
					} // 获取到相对于拖拽元素点击的位置并且赋值给全局变量 「tapDistanceLeft」

					tapDistanceLeft = tapEvt.clientX - dragRect.left
					tapDistanceTop = tapEvt.clientY - dragRect.top
					var cloneDragEl = clone(dragEl)

					if (!cacheVar.get('dragging')) {
						// console.log('触发一次存储')
						cacheVar.set('rootEl', el)
						cacheVar.set('dragEl', cloneDragEl)
						cacheVar.set('dragEl', dragEl)
						cacheVar.set('parentEl', dragEl.parentNode)
						cacheVar.set('nextEl', dragEl.nextSibling)
						cacheVar.set('lastDownEl', target)
						cacheVar.set('activeGroup', options.group)
						cacheVar.set('tapDistanceLeft', tapDistanceLeft)
						cacheVar.set('tapDistanceTop', tapDistanceTop)
					} // 将点击的相对于视窗的位置赋值给当前拖拽构造函数的变量

					this._lastX = (touch || evt).clientX
					this._lastY = (touch || evt).clientY
					dragEl.style['will-change'] = 'all'

					dragStartFn = function dragStartFn() {
						pluginEvent('delayEnded', _this, {
							evt: evt
						})

						if (Sortable.eventCanceled) {
							_this._onDrop()

							return
						} // Delayed drag has been triggered
						// we can re-enable the events: touchmove/mousemove

						_this._disableDelayedDragEvents()

						if (!FireFox && _this.nativeDraggable) {
							dragEl.draggable = true
						} // Bind the events: dragstart/dragend
						// 按下之后绑定事件

						_this._triggerDragStart(evt, touch) // Drag start event
						// 触发options中choose事件

						_dispatchEvent({
							sortable: _this,
							name: 'choose',
							originalEvent: evt
						}) // Chosen item
						// 设置拖拽元素的class

						toggleClass(dragEl, options.chosenClass, true)
					} // Disable "draggable"

					options.ignore.split(',').forEach(function (criteria) {
						find(dragEl, criteria.trim(), _disableDraggable)
					}) // 开始监听这些事件

					on(ownerDocument, 'dragover', nearestEmptyInsertDetectEvent)
					on(ownerDocument, 'mousemove', nearestEmptyInsertDetectEvent)
					on(ownerDocument, 'touchmove', nearestEmptyInsertDetectEvent)
					on(ownerDocument, 'mouseup', _this._onDrop)
					on(ownerDocument, 'touchend', _this._onDrop)
					on(ownerDocument, 'touchcancel', _this._onDrop) // Make dragEl draggable (must be before delay for FireFox)

					if (FireFox && this.nativeDraggable) {
						this.options.touchStartThreshold = 4
						dragEl.draggable = true
					}

					pluginEvent('delayStart', this, {
						evt: evt
					}) // Delay is impossible for native DnD in Edge or IE

					if (
						options.delay &&
						(!options.delayOnTouchOnly || touch) &&
						(!this.nativeDraggable || !(Edge || IE11OrLess))
					) {
						if (Sortable.eventCanceled) {
							this._onDrop()

							return
						} // If the user moves the pointer or let go the click or touch
						// before the delay has been reached:
						// disable the delayed drag

						on(ownerDocument, 'mouseup', _this._disableDelayedDrag)
						on(ownerDocument, 'touchend', _this._disableDelayedDrag)
						on(ownerDocument, 'touchcancel', _this._disableDelayedDrag)
						on(ownerDocument, 'mousemove', _this._delayedDragTouchMoveHandler)
						on(ownerDocument, 'touchmove', _this._delayedDragTouchMoveHandler)
						options.supportPointer &&
							on(
								ownerDocument,
								'pointermove',
								_this._delayedDragTouchMoveHandler
							)
						_this._dragStartTimer = setTimeout(dragStartFn, options.delay)
					} else {
						dragStartFn()
					}
				}
			},
			// _延迟拖动触摸移动处理程序
			_delayedDragTouchMoveHandler: function _delayedDragTouchMoveHandler(
				/** TouchEvent|PointerEvent **/
				e
			) {
				var touch = e.touches ? e.touches[0] : e

				if (
					Math.max(
						Math.abs(touch.clientX - this._lastX),
						Math.abs(touch.clientY - this._lastY)
					) >=
					Math.floor(
						this.options.touchStartThreshold /
							((this.nativeDraggable && window.devicePixelRatio) || 1)
					)
				) {
					this._disableDelayedDrag()
				}
			},
			_disableDelayedDrag: function _disableDelayedDrag() {
				dragEl && _disableDraggable(dragEl)
				clearTimeout(this._dragStartTimer)

				this._disableDelayedDragEvents()
			},
			_disableDelayedDragEvents: function _disableDelayedDragEvents() {
				var ownerDocument = this.el.ownerDocument
				off(ownerDocument, 'mouseup', this._disableDelayedDrag)
				off(ownerDocument, 'touchend', this._disableDelayedDrag)
				off(ownerDocument, 'touchcancel', this._disableDelayedDrag)
				off(ownerDocument, 'mousemove', this._delayedDragTouchMoveHandler)
				off(ownerDocument, 'touchmove', this._delayedDragTouchMoveHandler)
				off(ownerDocument, 'pointermove', this._delayedDragTouchMoveHandler)
			},
			_triggerDragStart: function _triggerDragStart(
				/** Event */
				evt,
				/** Touch */
				touch
			) {
				touch = touch || (evt.pointerType == 'touch' && evt) // 如果不支持原生拖拽和触摸事件

				if (!this.nativeDraggable || touch) {
					if (this.options.supportPointer) {
						on(document, 'pointermove', this._onTouchMove)
					} else if (touch) {
						on(document, 'touchmove', this._onTouchMove)
					} else {
						on(document, 'mousemove', this._onTouchMove)
					}
				} else {
					on(dragEl, 'dragend', this)
					on(rootEl, 'dragstart', this._onDragStart)
				}

				try {
					if (document.selection) {
						// Timeout neccessary for IE9
						_nextTick(function () {
							document.selection.empty()
						})
					} else {
						window.getSelection().removeAllRanges()
					}
				} catch (err) {}
			},
			_dragStarted: function _dragStarted(fallback, evt) {
				awaitingDragStarted = false

				if (rootEl && dragEl) {
					pluginEvent('dragStarted', this, {
						evt: evt
					})

					if (this.nativeDraggable) {
						on(document, 'dragover', _checkOutsideTargetEl)
					}

					var options = this.options // Apply effect

					!fallback && toggleClass(dragEl, options.dragClass, false)
					toggleClass(dragEl, options.ghostClass, true)
					Sortable.active = this
					fallback && this._appendGhost() // Drag start event

					_dispatchEvent({
						sortable: this,
						name: 'start',
						originalEvent: evt
					})
				} else {
					this._nulling()
				}
			},
			_emulateDragOver: function _emulateDragOver() {
				if (touchEvt) {
					this._lastX = touchEvt.clientX
					this._lastY = touchEvt.clientY

					_hideGhostForTarget()

					var target = document.elementFromPoint(
						touchEvt.clientX,
						touchEvt.clientY
					)
					var parent = target

					while (target && target.shadowRoot) {
						target = target.shadowRoot.elementFromPoint(
							touchEvt.clientX,
							touchEvt.clientY
						)
						if (target === parent) break
						parent = target
					}

					dragEl.parentNode[expando]._isOutsideThisEl(target)

					if (parent) {
						do {
							if (parent[expando]) {
								var inserted = void 0
								inserted = parent[expando]._onDragOver({
									clientX: touchEvt.clientX,
									clientY: touchEvt.clientY,
									target: target,
									rootEl: parent
								})

								if (inserted && !this.options.dragoverBubble) {
									break
								}
							}

							target = parent // store last element
						} while (
							/* jshint boss:true */
							(parent = parent.parentNode)
						)
					}

					_unhideGhostForTarget()
				}
			},
			_onTouchMove: function _onTouchMove(
				/**TouchEvent*/
				evt
			) {
				if (tapEvt) {
					var options = this.options,
						fallbackTolerance = options.fallbackTolerance,
						fallbackOffset = options.fallbackOffset,
						touch = evt.touches ? evt.touches[0] : evt,
						ghostMatrix = ghostEl && matrix(ghostEl, true),
						scaleX = ghostEl && ghostMatrix && ghostMatrix.a,
						scaleY = ghostEl && ghostMatrix && ghostMatrix.d,
						relativeScrollOffset =
							PositionGhostAbsolutely &&
							ghostRelativeParent &&
							getRelativeScrollOffset(ghostRelativeParent),
						dx =
							(touch.clientX - tapEvt.clientX + fallbackOffset.x) /
								(scaleX || 1) +
							(relativeScrollOffset
								? relativeScrollOffset[0] - ghostRelativeParentInitialScroll[0]
								: 0) /
								(scaleX || 1),
						dy =
							(touch.clientY - tapEvt.clientY + fallbackOffset.y) /
								(scaleY || 1) +
							(relativeScrollOffset
								? relativeScrollOffset[1] - ghostRelativeParentInitialScroll[1]
								: 0) /
								(scaleY || 1) // only set the status to dragging, when we are actually dragging

					if (!Sortable.active && !awaitingDragStarted) {
						if (
							fallbackTolerance &&
							Math.max(
								Math.abs(touch.clientX - this._lastX),
								Math.abs(touch.clientY - this._lastY)
							) < fallbackTolerance
						) {
							return
						}

						this._onDragStart(evt, true)
					}

					if (ghostEl) {
						if (ghostMatrix) {
							ghostMatrix.e += dx - (lastDx || 0)
							ghostMatrix.f += dy - (lastDy || 0)
						} else {
							ghostMatrix = {
								a: 1,
								b: 0,
								c: 0,
								d: 1,
								e: dx,
								f: dy
							}
						}

						var cssMatrix = 'matrix('
							.concat(ghostMatrix.a, ',')
							.concat(ghostMatrix.b, ',')
							.concat(ghostMatrix.c, ',')
							.concat(ghostMatrix.d, ',')
							.concat(ghostMatrix.e, ',')
							.concat(ghostMatrix.f, ')')
						css(ghostEl, 'webkitTransform', cssMatrix)
						css(ghostEl, 'mozTransform', cssMatrix)
						css(ghostEl, 'msTransform', cssMatrix)
						css(ghostEl, 'transform', cssMatrix)
						lastDx = dx
						lastDy = dy
						touchEvt = touch
					}

					evt.cancelable && evt.preventDefault()
				}
			},
			_appendGhost: function _appendGhost() {
				// Bug if using scale(): https://stackoverflow.com/questions/2637058
				// Not being adjusted for
				if (!ghostEl) {
					var container = this.options.fallbackOnBody ? document.body : rootEl,
						rect = getRect(
							dragEl,
							true,
							PositionGhostAbsolutely,
							true,
							container
						),
						options = this.options // Position absolutely

					if (PositionGhostAbsolutely) {
						// Get relatively positioned parent
						ghostRelativeParent = container

						while (
							css(ghostRelativeParent, 'position') === 'static' &&
							css(ghostRelativeParent, 'transform') === 'none' &&
							ghostRelativeParent !== document
						) {
							ghostRelativeParent = ghostRelativeParent.parentNode
						}

						if (
							ghostRelativeParent !== document.body &&
							ghostRelativeParent !== document.documentElement
						) {
							if (ghostRelativeParent === document)
								ghostRelativeParent = getWindowScrollingElement()
							rect.top += ghostRelativeParent.scrollTop
							rect.left += ghostRelativeParent.scrollLeft
						} else {
							ghostRelativeParent = getWindowScrollingElement()
						}

						ghostRelativeParentInitialScroll =
							getRelativeScrollOffset(ghostRelativeParent)
					}

					ghostEl = dragEl.cloneNode(true)
					toggleClass(ghostEl, options.ghostClass, false)
					toggleClass(ghostEl, options.fallbackClass, true)
					toggleClass(ghostEl, options.dragClass, true)
					css(ghostEl, 'transition', '')
					css(ghostEl, 'transform', '')
					css(ghostEl, 'box-sizing', 'border-box')
					css(ghostEl, 'margin', 0)
					css(ghostEl, 'top', rect.top)
					css(ghostEl, 'left', rect.left)
					css(ghostEl, 'width', rect.width)
					css(ghostEl, 'height', rect.height)
					css(ghostEl, 'opacity', '0.8')
					css(
						ghostEl,
						'position',
						PositionGhostAbsolutely ? 'absolute' : 'fixed'
					)
					css(ghostEl, 'zIndex', '100000')
					css(ghostEl, 'pointerEvents', 'none')
					Sortable.ghost = ghostEl
					container.appendChild(ghostEl) // Set transform-origin

					css(
						ghostEl,
						'transform-origin',
						(tapDistanceLeft / parseInt(ghostEl.style.width)) * 100 +
							'% ' +
							(tapDistanceTop / parseInt(ghostEl.style.height)) * 100 +
							'%'
					)
				}
			},
			_onDragStart: function _onDragStart(
				/**Event*/
				evt,
				/**boolean*/
				fallback
			) {
				var _this = this

				var dataTransfer = evt.dataTransfer
				var options = _this.options
				pluginEvent('dragStart', this, {
					evt: evt
				})

				if (Sortable.eventCanceled) {
					this._onDrop()

					return
				}

				pluginEvent('setupClone', this)

				if (!Sortable.eventCanceled) {
					// clone 一个 dragEl 元素副本，用于两个容器项目移动时使用；
					cloneEl = clone(dragEl)
					cloneEl.removeAttribute('id')
					cloneEl.draggable = false
					cloneEl.style['will-change'] = ''

					this._hideClone()

					toggleClass(cloneEl, this.options.chosenClass, false)
					Sortable.clone = cloneEl
				} // #1143: IFrame support workaround

				_this.cloneId = _nextTick(function () {
					pluginEvent('clone', _this)
					if (Sortable.eventCanceled) return

					if (!_this.options.removeCloneOnHide) {
						rootEl.insertBefore(cloneEl, dragEl)
					}

					_this._hideClone() // 触发外部传入的 clone 和 dragstart 事件；

					_dispatchEvent({
						sortable: _this,
						name: 'clone'
					})
				})
				!fallback && toggleClass(dragEl, options.dragClass, true) // Set proper drop events

				if (fallback) {
					ignoreNextClick = true
					_this._loopId = setInterval(_this._emulateDragOver, 50)
				} else {
					// Undo what was set in _prepareDragStart before drag started
					off(document, 'mouseup', _this._onDrop)
					off(document, 'touchend', _this._onDrop)
					off(document, 'touchcancel', _this._onDrop) // 设置拖拽数据

					if (dataTransfer) {
						dataTransfer.effectAllowed = 'move'
						options.setData && options.setData.call(_this, dataTransfer, dragEl)
					}

					on(document, 'drop', _this) // #1276 fix:

					css(dragEl, 'transform', 'translateZ(0)')
				}

				awaitingDragStarted = true
				_this._dragStartId = _nextTick(
					_this._dragStarted.bind(_this, fallback, evt)
				)
				on(document, 'selectstart', _this)
				moved = true

				if (Safari) {
					css(document.body, 'user-select', 'none')
				}
			},
			// Returns true - if no further action is needed (either inserted or another condition)
			// 返回 true - 如果不需要进一步操作（插入或其他条件）
			_onDragOver: function _onDragOver(
				/**Event*/
				evt
			) {
				var currentTime = Date.now()
				var elapsedTime = currentTime - lastExecutionTime
				if (elapsedTime <= MAX_TRIGGER_TIME) return
				lastExecutionTime = currentTime

				if (!cacheVar.get('dragging')) {
					cacheVar.set('dragging', true)
				} // cacheVar.set('dragging', true);

				var el = this.el,
					target = evt.target,
					dragRect,
					targetRect,
					revert,
					options = this.options,
					group = options.group,
					activeSortable = Sortable.active,
					isOwner = activeGroup === group,
					canSort = options.sort,
					fromSortable = putSortable || activeSortable,
					vertical,
					_this = this,
					completedFired = false,
					prevElement

				if (_silent) return

				function dragOverEvent(name, extra) {
					pluginEvent(
						name,
						_this,
						_objectSpread2(
							{
								evt: evt,
								isOwner: isOwner,
								axis: vertical ? 'vertical' : 'horizontal',
								revert: revert,
								dragRect: dragRect,
								targetRect: targetRect,
								canSort: canSort,
								fromSortable: fromSortable,
								target: target,
								completed: completed,
								onMove: function onMove(target, after) {
									return _onMove(
										rootEl,
										el,
										dragEl,
										dragRect,
										target,
										getRect(target),
										evt,
										after
									)
								},
								changed: changed
							},
							extra
						)
					)
				} // Capture animation state
				// 捕获动画状态

				function capture() {
					dragOverEvent('dragOverAnimationCapture')

					_this.captureAnimationState()

					if (_this !== fromSortable) {
						fromSortable.captureAnimationState()
					}
				} // Return invocation when dragEl is inserted (or completed)
				// 插入（或完成）dragEl 时返回调用

				function completed(insertion) {
					dragOverEvent('dragOverCompleted', {
						insertion: insertion
					})

					if (insertion) {
						// Clones must be hidden before folding animation to capture dragRectAbsolute properly
						// 必须在折叠动画之前隐藏克隆才能正确捕获 DragRectAbsolute
						if (isOwner) {
							activeSortable._hideClone()
						} else {
							activeSortable._showClone(_this)
						}

						if (_this !== fromSortable) {
							// Set ghost class to new sortable's ghost class
							toggleClass(
								dragEl,
								putSortable
									? putSortable.options.ghostClass
									: activeSortable.options.ghostClass,
								false
							)
							toggleClass(dragEl, options.ghostClass, true)
						}

						if (putSortable !== _this && _this !== Sortable.active) {
							putSortable = _this
						} else if (_this === Sortable.active && putSortable) {
							putSortable = null
						} // Animation

						if (fromSortable === _this) {
							_this._ignoreWhileAnimating = target
						}

						_this.animateAll(function () {
							dragOverEvent('dragOverAnimationComplete')
							_this._ignoreWhileAnimating = null
						})

						if (_this !== fromSortable) {
							fromSortable.animateAll()
							fromSortable._ignoreWhileAnimating = null
						}
					} // Null lastTarget if it is not inside a previously swapped element

					if (
						(target === dragEl && !dragEl.animated) ||
						(target === el && !target.animated)
					) {
						lastTarget = null
					} // no bubbling and not fallback

					if (!options.dragoverBubble && !evt.rootEl && target !== document) {
						// console.log('evt-是你吧', evt, dragEl)

						if (dragEl) {
							dragEl.parentNode[expando]._isOutsideThisEl(evt.target)
						} // Do not detect for empty insert if already inserted

						!insertion && nearestEmptyInsertDetectEvent(evt)
					}

					!options.dragoverBubble &&
						evt.stopPropagation &&
						evt.stopPropagation()
					return (completedFired = true)
				} // Call when dragEl has been inserted
				// 当dragEl被插入时调用

				function changed() {
					newIndex = index(dragEl)
					newDraggableIndex = index(dragEl, options.draggable) // console.log('newIndex, oldIndex changed', newIndex, oldIndex)

					_dispatchEvent({
						sortable: _this,
						name: 'change',
						toEl: el,
						newIndex: newIndex,
						newDraggableIndex: newDraggableIndex,
						originalEvent: evt
					})
				}

				if (evt.preventDefault !== void 0) {
					evt.cancelable && evt.preventDefault()
				}

				target = closest(target, options.draggable, el, true)
				dragOverEvent('dragOver')
				if (Sortable.eventCanceled) return completedFired

				if (
					dragEl.contains(evt.target) ||
					(target.animated && target.animatingX && target.animatingY) ||
					_this._ignoreWhileAnimating === target
				) {
					return completed(false)
				}

				ignoreNextClick = false

				if (
					activeSortable &&
					!options.disabled &&
					(isOwner
						? canSort || (revert = parentEl !== rootEl) // Reverting item into the original list
						: putSortable === this ||
						  ((this.lastPutMode = activeGroup.checkPull(
								this,
								activeSortable,
								dragEl,
								evt
						  )) &&
								group.checkPut(this, activeSortable, dragEl, evt)))
				) {
					vertical = this._getDirection(evt, target) === 'vertical' // 获取拖动元素的坐标信息

					dragRect = getRect(dragEl)
					dragOverEvent('dragOverValid')
					if (Sortable.eventCanceled) return completedFired

					if (revert) {
						parentEl = rootEl // actualization

						capture()

						this._hideClone()

						dragOverEvent('revert')

						if (!Sortable.eventCanceled) {
							if (nextEl) {
								rootEl.insertBefore(dragEl, nextEl)
							} else {
								rootEl.appendChild(dragEl)
							}
						}

						return completed(true)
					}

					var elLastChild = lastChild(el, options.draggable)

					if (
						!elLastChild ||
						(_ghostIsLast(evt, vertical, this) && !elLastChild.animated)
					) {
						// Insert to end of list
						// If already at end of list: Do not insert
						if (elLastChild === dragEl) {
							return completed(false)
						} // if there is a last element, it is the target

						if (elLastChild && el === evt.target) {
							target = elLastChild
						}

						if (target) {
							targetRect = getRect(target)
						}
					}

					if (target === dragEl.parentNode) {
						return completed(false)
					}
					// 自定义内容
					var dndDirection = getDirection(dragEl, target)
					// console.log('dndDirection', dndDirection)
					var _activeSortable = Sortable.active

					if (dndDirection !== 'horizontal') {
						parentEl = dragEl.parentNode // actualization

						_silent = true
						setTimeout(_unsilent, 30)
						capture()
						// console.log('dragEl', dragEl, target)
						// 是否开启交换而不是插入
						if (_activeSortable.options.openSwap) {
							var prevSwapEl = lastSwapEl$1

							if (
								_onMove(
									rootEl,
									el,
									dragEl,
									dragRect,
									target,
									targetRect,
									evt,
									false
								) !== false
							) {
								toggleClass(target, options.customSwapClass, true)
								lastSwapEl$1 = target
							} else {
								lastSwapEl$1 = null
							}

							if (prevSwapEl && prevSwapEl !== lastSwapEl$1) {
								toggleClass(prevSwapEl, options.customSwapClass, false)
							}
							// 缓存的还是之前的DOM, 但是进入非自己的元素之后坐标位置会变, 需要根据索引去获取到最新的DOM
							// 主项目内数据没变, 所以去同步位置不会生效

							// 跨大行拖拽
							if (dndDirection === 'vertical-across-rows') {
								var dragPos = getPosition(dragEl)
								var targetPos = getPosition(target)

								if (dragPos && targetPos) {
									if (dragPos.length === targetPos.length) {
										dndDirection = 'vertical'
									} else {
										var allDoms = fillArray(dragPos, targetPos, dragEl, target)
										// console.log('allDoms', allDoms)

										_dispatchEvent({
											sortable: this,
											name: 'customSwap',
											toEl: parentEl,
											originalEvent: evt,
											swapDoms: allDoms.doms,
											maxDom: allDoms.maxPosDom,
											indexes: allDoms.indexes
										})

										setTimeout(function () {
											changed()
											return completed(true)
										}, 0)
									}
								} else {
									setTimeout(function () {
										changed()
										return completed(true)
									}, 0)
								}
							} // 小图标上下垂直拖拽

							if (dndDirection === 'vertical') {
								newIndex = index(dragEl)
								newDraggableIndex = index(dragEl, options.draggable)
								oldIndex = index(target)
								oldDraggableIndex = index(target, options.draggable)

								if (newIndex !== oldIndex) {
									if (newIndex >= 0) {
										// drag & drop within the same list
										_dispatchEvent({
											sortable: this,
											name: 'update',
											toEl: parentEl,
											originalEvent: evt
										})

										_dispatchEvent({
											sortable: this,
											name: 'sort',
											toEl: parentEl,
											originalEvent: evt
										})
									}

									if (prevElement) {
										dragEl = prevElement
										prevElement = null
									}

									this.save()
								}

								setTimeout(function () {
									changed()
									return completed(true)
								}, 0)
							} // 拖拽奇数行小组件放到偶数行中/大组件

							if (dndDirection === 'vertical-drag') {
								prevElement = dragEl
								var evenElement = getElement(dragEl)

								if (evenElement) {
									dragEl = evenElement
									oldIndex = index(evenElement)
									oldDraggableIndex = index(evenElement, options.draggable)
									newIndex = index(target)
									newDraggableIndex = index(target, options.draggable)
								}

								if (newIndex !== oldIndex) {
									if (newIndex >= 0) {
										// drag & drop within the same list
										_dispatchEvent({
											sortable: this,
											name: 'update',
											toEl: parentEl,
											originalEvent: evt
										})

										_dispatchEvent({
											sortable: this,
											name: 'sort',
											toEl: parentEl,
											originalEvent: evt
										})
									}

									if (prevElement) {
										dragEl = prevElement
										prevElement = null
									}

									this.save()
								}

								setTimeout(function () {
									changed()
									return completed(true)
								}, 0)
							} // 拖拽中/大组件放到奇数行小组件

							if (dndDirection === 'vertical-drop') {
								prevElement = target

								var _evenElement = getElement(target)

								if (_evenElement) {
									target = _evenElement
									newIndex = index(_evenElement)
									newDraggableIndex = index(_evenElement, options.draggable)
									oldIndex = index(dragEl)
									oldDraggableIndex = index(dragEl, options.draggable)
								}

								if (newIndex !== oldIndex) {
									if (newIndex >= 0) {
										// drag & drop within the same list
										_dispatchEvent({
											sortable: this,
											name: 'update',
											toEl: parentEl,
											originalEvent: evt
										})

										_dispatchEvent({
											sortable: this,
											name: 'sort',
											toEl: parentEl,
											originalEvent: evt
										})
									}

									if (prevElement) {
										target = prevElement
										prevElement = null
									}

									this.save()
								}

								setTimeout(function () {
									changed()
									return completed(true)
								}, 0)
							}
						}
					} else {
						parentEl = dragEl.parentNode // actualization

						_silent = true
						setTimeout(_unsilent, 30)
						capture()
						oldIndex = index(target)
						oldDraggableIndex = index(target, options.draggable)
						newIndex = index(dragEl)
						newDraggableIndex = index(dragEl, options.draggable)

						if (newIndex !== oldIndex) {
							if (newIndex >= 0) {
								// drag & drop within the same list
								_dispatchEvent({
									sortable: this,
									name: 'update',
									toEl: parentEl,
									originalEvent: evt
								})

								_dispatchEvent({
									sortable: this,
									name: 'sort',
									toEl: parentEl,
									originalEvent: evt
								})
							}

							this.save()
						}

						setTimeout(function () {
							changed()
							return completed(true)
						}, 0)
					}

					if (el.contains(dragEl)) {
						return completed(false)
					}
				}

				return false
			},
			_ignoreWhileAnimating: null,
			_offMoveEvents: function _offMoveEvents() {
				off(document, 'mousemove', this._onTouchMove)
				off(document, 'touchmove', this._onTouchMove)
				off(document, 'pointermove', this._onTouchMove)
				off(document, 'dragover', nearestEmptyInsertDetectEvent)
				off(document, 'mousemove', nearestEmptyInsertDetectEvent)
				off(document, 'touchmove', nearestEmptyInsertDetectEvent)
			},
			_offUpEvents: function _offUpEvents() {
				var ownerDocument = this.el.ownerDocument
				off(ownerDocument, 'mouseup', this._onDrop)
				off(ownerDocument, 'touchend', this._onDrop)
				off(ownerDocument, 'pointerup', this._onDrop)
				off(ownerDocument, 'touchcancel', this._onDrop)
				off(document, 'selectstart', this)
			},
			_onDrop: function _onDrop(
				/**Event*/
				evt
			) {
				// console.log('松手了')
				var el = this.el,
					options = this.options // Get the index of the dragged element within its parent

				newIndex = index(dragEl)
				newDraggableIndex = index(dragEl, options.draggable)
				pluginEvent('drop', this, {
					evt: evt
				})
				parentEl = dragEl && dragEl.parentNode // Get again after plugin event

				newIndex = index(dragEl)
				newDraggableIndex = index(dragEl, options.draggable)

				if (Sortable.eventCanceled) {
					this._nulling()

					return
				}

				awaitingDragStarted = false
				clearInterval(this._loopId)
				clearTimeout(this._dragStartTimer)

				_cancelNextTick(this.cloneId)

				_cancelNextTick(this._dragStartId) // Unbind events

				if (this.nativeDraggable) {
					off(document, 'drop', this)
					off(el, 'dragstart', this._onDragStart)
				}

				this._offMoveEvents()

				this._offUpEvents()

				if (Safari) {
					css(document.body, 'user-select', '')
				}

				css(dragEl, 'transform', '')

				if (evt) {
					if (moved) {
						evt.cancelable && evt.preventDefault()
						!options.dropBubble && evt.stopPropagation()
					}

					ghostEl &&
						ghostEl.parentNode &&
						ghostEl.parentNode.removeChild(ghostEl)

					if (
						rootEl === parentEl ||
						(putSortable && putSortable.lastPutMode !== 'clone')
					) {
						// Remove clone(s)
						cloneEl &&
							cloneEl.parentNode &&
							cloneEl.parentNode.removeChild(cloneEl)
					}

					if (dragEl) {
						if (this.nativeDraggable) {
							off(dragEl, 'dragend', this)
						}

						_disableDraggable(dragEl)

						dragEl.style['will-change'] = '' // Remove classes
						// ghostClass is added in dragStarted

						if (moved && !awaitingDragStarted) {
							toggleClass(
								dragEl,
								putSortable
									? putSortable.options.ghostClass
									: this.options.ghostClass,
								false
							)
						}

						toggleClass(dragEl, this.options.chosenClass, false) // Drag stop event
						// 元素取消选中

						_dispatchEvent({
							sortable: this,
							name: 'unchoose',
							toEl: parentEl,
							newIndex: null,
							newDraggableIndex: null,
							originalEvent: evt
						})

						if (rootEl !== parentEl) {
							if (newIndex >= 0) {
								// Add event
								// 元素从一个列表拖拽到另一个列表
								_dispatchEvent({
									rootEl: parentEl,
									name: 'add',
									toEl: parentEl,
									fromEl: rootEl,
									originalEvent: evt
								}) // Remove event
								// 元素从列表中移除进入另一个列表

								_dispatchEvent({
									sortable: this,
									name: 'remove',
									toEl: parentEl,
									originalEvent: evt
								}) // drag from one list and drop into another

								_dispatchEvent({
									rootEl: parentEl,
									name: 'sort',
									toEl: parentEl,
									fromEl: rootEl,
									originalEvent: evt
								})

								_dispatchEvent({
									sortable: this,
									name: 'sort',
									toEl: parentEl,
									originalEvent: evt
								})
							}

							putSortable && putSortable.save()
						}

						if (Sortable.active) {
							/* jshint eqnull:true */
							if (newIndex == null || newIndex === -1) {
								newIndex = oldIndex
								newDraggableIndex = oldDraggableIndex
							}

							_dispatchEvent({
								sortable: this,
								name: 'end',
								toEl: parentEl,
								originalEvent: evt
							}) // Save sorting

							this.save()
						}
					}
				}

				toggleClass(lastSwapEl$1, options.customSwapClass, false)

				this._nulling()
			},
			_nulling: function _nulling() {
				pluginEvent('nulling', this)
				cacheVar.clear()
				lastSwapEl$1 = null
				rootEl =
					dragEl =
					parentEl =
					ghostEl =
					nextEl =
					cloneEl =
					lastDownEl =
					cloneHidden =
					tapEvt =
					touchEvt =
					moved =
					newIndex =
					newDraggableIndex =
					oldIndex =
					oldDraggableIndex =
					lastTarget =
					lastDirection =
					putSortable =
					activeGroup =
					Sortable.dragged =
					Sortable.ghost =
					Sortable.clone =
					Sortable.active =
						null
				savedInputChecked.forEach(function (el) {
					el.checked = true
				})
				savedInputChecked.length = lastDx = lastDy = 0
			},
			handleEvent: function handleEvent(
				/**Event*/
				evt
			) {
				switch (evt.type) {
					case 'drop':
					case 'dragend':
						this._onDrop(evt)

						break

					case 'dragenter':
					case 'dragover':
						if (dragEl) {
							this._onDragOver(evt)

							_globalDragOver(evt)
						}

						break

					case 'selectstart':
						evt.preventDefault()
						break
				}
			},

			/**
			 * Serializes the item into an array of string.
			 * @returns {String[]}
			 */
			toArray: function toArray() {
				var order = [],
					el,
					children = this.el.children,
					i = 0,
					n = children.length,
					options = this.options

				for (; i < n; i++) {
					el = children[i]

					if (closest(el, options.draggable, this.el, false)) {
						order.push(el.getAttribute(options.dataIdAttr) || _generateId(el))
					}
				}

				return order
			},

			/**
			 * Sorts the elements according to the array.
			 * @param  {String[]}  order  order of the items
			 */
			sort: function sort(order, useAnimation) {
				var items = {},
					rootEl = this.el
				this.toArray().forEach(function (id, i) {
					var el = rootEl.children[i]

					if (closest(el, this.options.draggable, rootEl, false)) {
						items[id] = el
					}
				}, this)
				useAnimation && this.captureAnimationState()
				order.forEach(function (id) {
					if (items[id]) {
						rootEl.removeChild(items[id])
						rootEl.appendChild(items[id])
					}
				})
				useAnimation && this.animateAll()
			},

			/**
			 * Save the current sorting
			 */
			save: function save() {
				var store = this.options.store
				store && store.set && store.set(this)
			},

			/**
			 * For each element in the set, get the first element that matches the selector by testing the element itself and traversing up through its ancestors in the DOM tree.
			 * @param   {HTMLElement}  el
			 * @param   {String}       [selector]  default: `options.draggable`
			 * @returns {HTMLElement|null}
			 */
			closest: function closest$1(el, selector) {
				return closest(el, selector || this.options.draggable, this.el, false)
			},

			/**
			 * Set/get option
			 * @param   {string} name
			 * @param   {*}      [value]
			 * @returns {*}
			 */
			option: function option(name, value) {
				var options = this.options

				if (value === void 0) {
					return options[name]
				} else {
					var modifiedValue = PluginManager.modifyOption(this, name, value)

					if (typeof modifiedValue !== 'undefined') {
						options[name] = modifiedValue
					} else {
						options[name] = value
					}

					if (name === 'group') {
						_prepareGroup(options)
					}
				}
			},

			/**
			 * Destroy
			 */
			destroy: function destroy() {
				pluginEvent('destroy', this)
				var el = this.el
				el[expando] = null
				off(el, 'mousedown', this._onTapStart)
				off(el, 'touchstart', this._onTapStart)
				off(el, 'pointerdown', this._onTapStart)

				if (this.nativeDraggable) {
					off(el, 'dragover', this)
					off(el, 'dragenter', this)
				} // Remove draggable attributes

				Array.prototype.forEach.call(
					el.querySelectorAll('[draggable]'),
					function (el) {
						el.removeAttribute('draggable')
					}
				)

				this._onDrop()

				this._disableDelayedDragEvents()

				sortables.splice(sortables.indexOf(this.el), 1)
				this.el = el = null
			},
			_hideClone: function _hideClone() {
				if (!cloneHidden) {
					pluginEvent('hideClone', this)
					if (Sortable.eventCanceled) return
					css(cloneEl, 'display', 'none')

					if (this.options.removeCloneOnHide && cloneEl && cloneEl.parentNode) {
						cloneEl.parentNode.removeChild(cloneEl)
					}

					cloneHidden = true
				}
			},
			_showClone: function _showClone(putSortable) {
				if (putSortable.lastPutMode !== 'clone') {
					this._hideClone()

					return
				}

				if (cloneHidden) {
					pluginEvent('showClone', this)
					if (Sortable.eventCanceled) return // show clone at dragEl or original position

					if (dragEl.parentNode == rootEl && !this.options.group.revertClone) {
						rootEl.insertBefore(cloneEl, dragEl)
					} else if (nextEl) {
						rootEl.insertBefore(cloneEl, nextEl)
					} else {
						rootEl.appendChild(cloneEl)
					}

					if (this.options.group.revertClone) {
						this.animate(dragEl, cloneEl)
					}

					css(cloneEl, 'display', '')
					cloneHidden = false
				}
			}
		}

	function _globalDragOver(
		/**Event*/
		evt
	) {
		if (evt.dataTransfer) {
			evt.dataTransfer.dropEffect = 'move'
		}

		evt.cancelable && evt.preventDefault()
	}

	function _onMove(
		fromEl,
		toEl,
		dragEl,
		dragRect,
		targetEl,
		targetRect,
		originalEvent,
		willInsertAfter
	) {
		var evt,
			sortable = fromEl[expando],
			onMoveFn = sortable.options.onMove,
			retVal // Support for new CustomEvent feature

		if (window.CustomEvent && !IE11OrLess && !Edge) {
			evt = new CustomEvent('move', {
				bubbles: true,
				cancelable: true
			})
		} else {
			evt = document.createEvent('Event')
			evt.initEvent('move', true, true)
		}

		evt.to = toEl
		evt.from = fromEl
		evt.dragged = dragEl
		evt.draggedRect = dragRect
		evt.related = targetEl || toEl
		evt.relatedRect = targetRect || getRect(toEl)
		evt.willInsertAfter = willInsertAfter
		evt.originalEvent = originalEvent
		fromEl.dispatchEvent(evt)

		if (onMoveFn) {
			retVal = onMoveFn.call(sortable, evt, originalEvent)
		}

		return retVal
	}

	function _disableDraggable(el) {
		el.draggable = false
	}

	function _unsilent() {
		_silent = false
	}

	function _ghostIsLast(evt, vertical, sortable) {
		var rect = getRect(lastChild(sortable.el, sortable.options.draggable))
		var spacer = 10
		return vertical
			? evt.clientX > rect.right + spacer ||
					(evt.clientX <= rect.right &&
						evt.clientY > rect.bottom &&
						evt.clientX >= rect.left)
			: (evt.clientX > rect.right && evt.clientY > rect.top) ||
					(evt.clientX <= rect.right && evt.clientY > rect.bottom + spacer)
	}
	/**
	 * Generate id
	 * @param   {HTMLElement} el
	 * @returns {String}
	 * @private
	 */

	function _generateId(el) {
		var str = el.tagName + el.className + el.src + el.href + el.textContent,
			i = str.length,
			sum = 0

		while (i--) {
			sum += str.charCodeAt(i)
		}

		return sum.toString(36)
	}

	function _saveInputCheckedState(root) {
		savedInputChecked.length = 0
		var inputs = root.getElementsByTagName('input')
		var idx = inputs.length

		while (idx--) {
			var el = inputs[idx]
			el.checked && savedInputChecked.push(el)
		}
	}

	function _nextTick(fn) {
		return setTimeout(fn, 0)
	}

	function _cancelNextTick(id) {
		return clearTimeout(id)
	} // Fixed #973:

	if (documentExists) {
		on(document, 'touchmove', function (evt) {
			if ((Sortable.active || awaitingDragStarted) && evt.cancelable) {
				evt.preventDefault()
			}
		})
	} // Export utils

	Sortable.utils = {
		on: on,
		off: off,
		css: css,
		find: find,
		is: function is(el, selector) {
			return !!closest(el, selector, el, false)
		},
		extend: extend,
		throttle: throttle,
		closest: closest,
		toggleClass: toggleClass,
		clone: clone,
		index: index,
		nextTick: _nextTick,
		cancelNextTick: _cancelNextTick,
		detectDirection: _detectDirection,
		getChild: getChild
	}
	/**
	 * Get the Sortable instance of an element
	 * @param  {HTMLElement} element The element
	 * @return {Sortable|undefined}         The instance of Sortable
	 */

	Sortable.get = function (element) {
		return element[expando]
	}
	/**
	 * Mount a plugin to Sortable
	 * @param  {...SortablePlugin|SortablePlugin[]} plugins       Plugins being mounted
	 */

	Sortable.mount = function () {
		for (
			var _len = arguments.length, plugins = new Array(_len), _key = 0;
			_key < _len;
			_key++
		) {
			plugins[_key] = arguments[_key]
		}

		if (plugins[0].constructor === Array) plugins = plugins[0]
		plugins.forEach(function (plugin) {
			if (!plugin.prototype || !plugin.prototype.constructor) {
				throw 'Sortable: Mounted plugin must be a constructor function, not '.concat(
					{}.toString.call(plugin)
				)
			}

			if (plugin.utils)
				Sortable.utils = _objectSpread2(
					_objectSpread2({}, Sortable.utils),
					plugin.utils
				)
			PluginManager.mount(plugin)
		})
	}
	/**
	 * Create sortable instance
	 * @param {HTMLElement}  el
	 * @param {Object}      [options]
	 */

	Sortable.create = function (el, options) {
		return new Sortable(el, options)
	} // Export

	Sortable.version = version
	Sortable.mount(SwapPlugin)

	var autoScrolls = [],
		scrollEl,
		scrollRootEl,
		scrolling = false,
		lastAutoScrollX,
		lastAutoScrollY,
		touchEvt$1,
		pointerElemChangedInterval

	function AutoScrollPlugin() {
		function AutoScroll() {
			this.defaults = {
				scroll: true,
				forceAutoScrollFallback: false,
				scrollSensitivity: 30,
				scrollSpeed: 10,
				bubbleScroll: true
			} // Bind all private methods

			for (var fn in this) {
				if (fn.charAt(0) === '_' && typeof this[fn] === 'function') {
					this[fn] = this[fn].bind(this)
				}
			}
		}

		AutoScroll.prototype = {
			dragStarted: function dragStarted(_ref) {
				var originalEvent = _ref.originalEvent

				if (this.sortable.nativeDraggable) {
					on(document, 'dragover', this._handleAutoScroll)
				} else {
					if (this.options.supportPointer) {
						on(document, 'pointermove', this._handleFallbackAutoScroll)
					} else if (originalEvent.touches) {
						on(document, 'touchmove', this._handleFallbackAutoScroll)
					} else {
						on(document, 'mousemove', this._handleFallbackAutoScroll)
					}
				}
			},
			dragOverCompleted: function dragOverCompleted(_ref2) {
				var originalEvent = _ref2.originalEvent

				// For when bubbling is canceled and using fallback (fallback 'touchmove' always reached)
				if (!this.options.dragOverBubble && !originalEvent.rootEl) {
					this._handleAutoScroll(originalEvent)
				}
			},
			drop: function drop() {
				if (this.sortable.nativeDraggable) {
					off(document, 'dragover', this._handleAutoScroll)
				} else {
					off(document, 'pointermove', this._handleFallbackAutoScroll)
					off(document, 'touchmove', this._handleFallbackAutoScroll)
					off(document, 'mousemove', this._handleFallbackAutoScroll)
				}

				clearPointerElemChangedInterval()
				clearAutoScrolls()
				cancelThrottle()
			},
			nulling: function nulling() {
				touchEvt$1 =
					scrollRootEl =
					scrollEl =
					scrolling =
					pointerElemChangedInterval =
					lastAutoScrollX =
					lastAutoScrollY =
						null
				autoScrolls.length = 0
			},
			_handleFallbackAutoScroll: function _handleFallbackAutoScroll(evt) {
				this._handleAutoScroll(evt, true)
			},
			_handleAutoScroll: function _handleAutoScroll(evt, fallback) {
				var _this = this

				var x = (evt.touches ? evt.touches[0] : evt).clientX,
					y = (evt.touches ? evt.touches[0] : evt).clientY,
					elem = document.elementFromPoint(x, y)
				touchEvt$1 = evt // IE does not seem to have native autoscroll,
				// Edge's autoscroll seems too conditional,
				// MACOS Safari does not have autoscroll,
				// Firefox and Chrome are good

				if (
					fallback ||
					this.options.forceAutoScrollFallback ||
					Edge ||
					IE11OrLess ||
					Safari
				) {
					autoScroll(evt, this.options, elem, fallback) // Listener for pointer element change

					var ogElemScroller = getParentAutoScrollElement(elem, true)

					if (
						scrolling &&
						(!pointerElemChangedInterval ||
							x !== lastAutoScrollX ||
							y !== lastAutoScrollY)
					) {
						pointerElemChangedInterval && clearPointerElemChangedInterval() // Detect for pointer elem change, emulating native DnD behaviour

						pointerElemChangedInterval = setInterval(function () {
							var newElem = getParentAutoScrollElement(
								document.elementFromPoint(x, y),
								true
							)

							if (newElem !== ogElemScroller) {
								ogElemScroller = newElem
								clearAutoScrolls()
							}

							autoScroll(evt, _this.options, newElem, fallback)
						}, 10)
						lastAutoScrollX = x
						lastAutoScrollY = y
					}
				} else {
					// if DnD is enabled (and browser has good autoscrolling), first autoscroll will already scroll, so get parent autoscroll of first autoscroll
					if (
						!this.options.bubbleScroll ||
						getParentAutoScrollElement(elem, true) ===
							getWindowScrollingElement()
					) {
						clearAutoScrolls()
						return
					}

					autoScroll(
						evt,
						this.options,
						getParentAutoScrollElement(elem, false),
						false
					)
				}
			}
		}
		return _extends(AutoScroll, {
			pluginName: 'scroll',
			initializeByDefault: true
		})
	}

	function clearAutoScrolls() {
		autoScrolls.forEach(function (autoScroll) {
			clearInterval(autoScroll.pid)
		})
		autoScrolls = []
	}

	function clearPointerElemChangedInterval() {
		clearInterval(pointerElemChangedInterval)
	}

	var autoScroll = throttle(function (evt, options, rootEl, isFallback) {
		// Bug: https://bugzilla.mozilla.org/show_bug.cgi?id=505521
		if (!options.scroll) return
		var x = (evt.touches ? evt.touches[0] : evt).clientX,
			y = (evt.touches ? evt.touches[0] : evt).clientY,
			sens = options.scrollSensitivity,
			speed = options.scrollSpeed,
			winScroller = getWindowScrollingElement()
		var scrollThisInstance = false,
			scrollCustomFn // New scroll root, set scrollEl

		if (scrollRootEl !== rootEl) {
			scrollRootEl = rootEl
			clearAutoScrolls()
			scrollEl = options.scroll
			scrollCustomFn = options.scrollFn

			if (scrollEl === true) {
				scrollEl = getParentAutoScrollElement(rootEl, true)
			}
		}

		var layersOut = 0
		var currentParent = scrollEl

		do {
			var el = currentParent,
				rect = getRect(el),
				top = rect.top,
				bottom = rect.bottom,
				left = rect.left,
				right = rect.right,
				width = rect.width,
				height = rect.height,
				canScrollX = void 0,
				canScrollY = void 0,
				scrollWidth = el.scrollWidth,
				scrollHeight = el.scrollHeight,
				elCSS = css(el),
				scrollPosX = el.scrollLeft,
				scrollPosY = el.scrollTop

			if (el === winScroller) {
				canScrollX =
					width < scrollWidth &&
					(elCSS.overflowX === 'auto' ||
						elCSS.overflowX === 'scroll' ||
						elCSS.overflowX === 'visible')
				canScrollY =
					height < scrollHeight &&
					(elCSS.overflowY === 'auto' ||
						elCSS.overflowY === 'scroll' ||
						elCSS.overflowY === 'visible')
			} else {
				canScrollX =
					width < scrollWidth &&
					(elCSS.overflowX === 'auto' || elCSS.overflowX === 'scroll')
				canScrollY =
					height < scrollHeight &&
					(elCSS.overflowY === 'auto' || elCSS.overflowY === 'scroll')
			}

			var vx =
				canScrollX &&
				(Math.abs(right - x) <= sens && scrollPosX + width < scrollWidth) -
					(Math.abs(left - x) <= sens && !!scrollPosX)
			var vy =
				canScrollY &&
				(Math.abs(bottom - y) <= sens && scrollPosY + height < scrollHeight) -
					(Math.abs(top - y) <= sens && !!scrollPosY)

			if (!autoScrolls[layersOut]) {
				for (var i = 0; i <= layersOut; i++) {
					if (!autoScrolls[i]) {
						autoScrolls[i] = {}
					}
				}
			}

			if (
				autoScrolls[layersOut].vx != vx ||
				autoScrolls[layersOut].vy != vy ||
				autoScrolls[layersOut].el !== el
			) {
				autoScrolls[layersOut].el = el
				autoScrolls[layersOut].vx = vx
				autoScrolls[layersOut].vy = vy
				clearInterval(autoScrolls[layersOut].pid)

				if (vx != 0 || vy != 0) {
					scrollThisInstance = true
					/* jshint loopfunc:true */

					autoScrolls[layersOut].pid = setInterval(
						function () {
							// emulate drag over during autoscroll (fallback), emulating native DnD behaviour
							if (isFallback && this.layer === 0) {
								Sortable.active._onTouchMove(touchEvt$1) // To move ghost if it is positioned absolutely
							}

							var scrollOffsetY = autoScrolls[this.layer].vy
								? autoScrolls[this.layer].vy * speed
								: 0
							var scrollOffsetX = autoScrolls[this.layer].vx
								? autoScrolls[this.layer].vx * speed
								: 0

							if (typeof scrollCustomFn === 'function') {
								if (
									scrollCustomFn.call(
										Sortable.dragged.parentNode[expando],
										scrollOffsetX,
										scrollOffsetY,
										evt,
										touchEvt$1,
										autoScrolls[this.layer].el
									) !== 'continue'
								) {
									return
								}
							}

							scrollBy(autoScrolls[this.layer].el, scrollOffsetX, scrollOffsetY)
						}.bind({
							layer: layersOut
						}),
						24
					)
				}
			}

			layersOut++
		} while (options.bubbleScroll && currentParent !== winScroller && (currentParent = getParentAutoScrollElement(currentParent, false)))

		scrolling = scrollThisInstance // in case another function catches scrolling as false in between when it is not
	}, 30)

	var drop = function drop(_ref) {
		var originalEvent = _ref.originalEvent,
			putSortable = _ref.putSortable,
			dragEl = _ref.dragEl,
			activeSortable = _ref.activeSortable,
			dispatchSortableEvent = _ref.dispatchSortableEvent,
			hideGhostForTarget = _ref.hideGhostForTarget,
			unhideGhostForTarget = _ref.unhideGhostForTarget
		if (!originalEvent) return
		var toSortable = putSortable || activeSortable
		hideGhostForTarget()
		var touch =
			originalEvent.changedTouches && originalEvent.changedTouches.length
				? originalEvent.changedTouches[0]
				: originalEvent
		var target = document.elementFromPoint(touch.clientX, touch.clientY)
		unhideGhostForTarget()

		if (toSortable && !toSortable.el.contains(target)) {
			dispatchSortableEvent('spill')
			this.onSpill({
				dragEl: dragEl,
				putSortable: putSortable
			})
		}
	}

	function Revert() {}

	Revert.prototype = {
		startIndex: null,
		dragStart: function dragStart(_ref2) {
			var oldDraggableIndex = _ref2.oldDraggableIndex
			this.startIndex = oldDraggableIndex
		},
		onSpill: function onSpill(_ref3) {
			var dragEl = _ref3.dragEl,
				putSortable = _ref3.putSortable
			this.sortable.captureAnimationState()

			if (putSortable) {
				putSortable.captureAnimationState()
			}

			var nextSibling = getChild(
				this.sortable.el,
				this.startIndex,
				this.options
			)

			if (nextSibling) {
				this.sortable.el.insertBefore(dragEl, nextSibling)
			} else {
				this.sortable.el.appendChild(dragEl)
			}

			this.sortable.animateAll()

			if (putSortable) {
				putSortable.animateAll()
			}
		},
		drop: drop
	}

	_extends(Revert, {
		pluginName: 'revertOnSpill'
	})

	function Remove() {}

	Remove.prototype = {
		onSpill: function onSpill(_ref4) {
			var dragEl = _ref4.dragEl,
				putSortable = _ref4.putSortable
			var parentSortable = putSortable || this.sortable
			parentSortable.captureAnimationState()
			dragEl.parentNode && dragEl.parentNode.removeChild(dragEl)
			parentSortable.animateAll()
		},
		drop: drop
	}

	_extends(Remove, {
		pluginName: 'removeOnSpill'
	})

	var multiDragElements = [],
		multiDragClones = [],
		lastMultiDragSelect,
		// for selection with modifier key down (SHIFT)
		multiDragSortable,
		initialFolding = false,
		// Initial multi-drag fold when drag started
		folding = false,
		// Folding any other time
		dragStarted = false,
		dragEl$1,
		clonesFromRect,
		clonesHidden

	function MultiDragPlugin() {
		function MultiDrag(sortable) {
			// Bind all private methods
			for (var fn in this) {
				if (fn.charAt(0) === '_' && typeof this[fn] === 'function') {
					this[fn] = this[fn].bind(this)
				}
			}

			if (!sortable.options.avoidImplicitDeselect) {
				if (sortable.options.supportPointer) {
					on(document, 'pointerup', this._deselectMultiDrag)
				} else {
					on(document, 'mouseup', this._deselectMultiDrag)
					on(document, 'touchend', this._deselectMultiDrag)
				}
			}

			on(document, 'keydown', this._checkKeyDown)
			on(document, 'keyup', this._checkKeyUp)
			this.defaults = {
				selectedClass: 'sortable-selected',
				multiDragKey: null,
				avoidImplicitDeselect: false,
				setData: function setData(dataTransfer, dragEl) {
					var data = ''

					if (multiDragElements.length && multiDragSortable === sortable) {
						multiDragElements.forEach(function (multiDragElement, i) {
							data += (!i ? '' : ', ') + multiDragElement.textContent
						})
					} else {
						data = dragEl.textContent
					}

					dataTransfer.setData('Text', data)
				}
			}
		}

		MultiDrag.prototype = {
			multiDragKeyDown: false,
			isMultiDrag: false,
			delayStartGlobal: function delayStartGlobal(_ref) {
				var dragged = _ref.dragEl
				dragEl$1 = dragged
			},
			delayEnded: function delayEnded() {
				this.isMultiDrag = ~multiDragElements.indexOf(dragEl$1)
			},
			setupClone: function setupClone(_ref2) {
				var sortable = _ref2.sortable,
					cancel = _ref2.cancel
				if (!this.isMultiDrag) return

				for (var i = 0; i < multiDragElements.length; i++) {
					multiDragClones.push(clone(multiDragElements[i]))
					multiDragClones[i].sortableIndex = multiDragElements[i].sortableIndex
					multiDragClones[i].draggable = false
					multiDragClones[i].style['will-change'] = ''
					toggleClass(multiDragClones[i], this.options.selectedClass, false)
					multiDragElements[i] === dragEl$1 &&
						toggleClass(multiDragClones[i], this.options.chosenClass, false)
				}

				sortable._hideClone()

				cancel()
			},
			clone: function clone(_ref3) {
				var sortable = _ref3.sortable,
					rootEl = _ref3.rootEl,
					dispatchSortableEvent = _ref3.dispatchSortableEvent,
					cancel = _ref3.cancel
				if (!this.isMultiDrag) return

				if (!this.options.removeCloneOnHide) {
					if (multiDragElements.length && multiDragSortable === sortable) {
						insertMultiDragClones(true, rootEl)
						dispatchSortableEvent('clone')
						cancel()
					}
				}
			},
			showClone: function showClone(_ref4) {
				var cloneNowShown = _ref4.cloneNowShown,
					rootEl = _ref4.rootEl,
					cancel = _ref4.cancel
				if (!this.isMultiDrag) return
				insertMultiDragClones(false, rootEl)
				multiDragClones.forEach(function (clone) {
					css(clone, 'display', '')
				})
				cloneNowShown()
				clonesHidden = false
				cancel()
			},
			hideClone: function hideClone(_ref5) {
				var _this = this

				var sortable = _ref5.sortable,
					cloneNowHidden = _ref5.cloneNowHidden,
					cancel = _ref5.cancel
				if (!this.isMultiDrag) return
				multiDragClones.forEach(function (clone) {
					css(clone, 'display', 'none')

					if (_this.options.removeCloneOnHide && clone.parentNode) {
						clone.parentNode.removeChild(clone)
					}
				})
				cloneNowHidden()
				clonesHidden = true
				cancel()
			},
			dragStartGlobal: function dragStartGlobal(_ref6) {
				var sortable = _ref6.sortable

				if (!this.isMultiDrag && multiDragSortable) {
					multiDragSortable.multiDrag._deselectMultiDrag()
				}

				multiDragElements.forEach(function (multiDragElement) {
					multiDragElement.sortableIndex = index(multiDragElement)
				}) // Sort multi-drag elements

				multiDragElements = multiDragElements.sort(function (a, b) {
					return a.sortableIndex - b.sortableIndex
				})
				dragStarted = true
			},
			dragStarted: function dragStarted(_ref7) {
				var _this2 = this

				var sortable = _ref7.sortable
				if (!this.isMultiDrag) return

				if (this.options.sort) {
					// Capture rects,
					// hide multi drag elements (by positioning them absolute),
					// set multi drag elements rects to dragRect,
					// show multi drag elements,
					// animate to rects,
					// unset rects & remove from DOM
					sortable.captureAnimationState()

					if (this.options.animation) {
						multiDragElements.forEach(function (multiDragElement) {
							if (multiDragElement === dragEl$1) return
							css(multiDragElement, 'position', 'absolute')
						})
						var dragRect = getRect(dragEl$1, false, true, true)
						multiDragElements.forEach(function (multiDragElement) {
							if (multiDragElement === dragEl$1) return
							setRect(multiDragElement, dragRect)
						})
						folding = true
						initialFolding = true
					}
				}

				sortable.animateAll(function () {
					folding = false
					initialFolding = false

					if (_this2.options.animation) {
						multiDragElements.forEach(function (multiDragElement) {
							unsetRect(multiDragElement)
						})
					} // Remove all auxiliary multidrag items from el, if sorting enabled

					if (_this2.options.sort) {
						removeMultiDragElements()
					}
				})
			},
			dragOver: function dragOver(_ref8) {
				var target = _ref8.target,
					completed = _ref8.completed,
					cancel = _ref8.cancel

				if (folding && ~multiDragElements.indexOf(target)) {
					completed(false)
					cancel()
				}
			},
			revert: function revert(_ref9) {
				var fromSortable = _ref9.fromSortable,
					rootEl = _ref9.rootEl,
					sortable = _ref9.sortable,
					dragRect = _ref9.dragRect

				if (multiDragElements.length > 1) {
					// Setup unfold animation
					multiDragElements.forEach(function (multiDragElement) {
						sortable.addAnimationState({
							target: multiDragElement,
							rect: folding ? getRect(multiDragElement) : dragRect
						})
						unsetRect(multiDragElement)
						multiDragElement.fromRect = dragRect
						fromSortable.removeAnimationState(multiDragElement)
					})
					folding = false
					insertMultiDragElements(!this.options.removeCloneOnHide, rootEl)
				}
			},
			dragOverCompleted: function dragOverCompleted(_ref10) {
				var sortable = _ref10.sortable,
					isOwner = _ref10.isOwner,
					insertion = _ref10.insertion,
					activeSortable = _ref10.activeSortable,
					parentEl = _ref10.parentEl,
					putSortable = _ref10.putSortable
				var options = this.options

				if (insertion) {
					// Clones must be hidden before folding animation to capture dragRectAbsolute properly
					if (isOwner) {
						activeSortable._hideClone()
					}

					initialFolding = false // If leaving sort:false root, or already folding - Fold to new location

					if (
						options.animation &&
						multiDragElements.length > 1 &&
						(folding ||
							(!isOwner && !activeSortable.options.sort && !putSortable))
					) {
						// Fold: Set all multi drag elements's rects to dragEl's rect when multi-drag elements are invisible
						var dragRectAbsolute = getRect(dragEl$1, false, true, true)
						multiDragElements.forEach(function (multiDragElement) {
							if (multiDragElement === dragEl$1) return
							setRect(multiDragElement, dragRectAbsolute) // Move element(s) to end of parentEl so that it does not interfere with multi-drag clones insertion if they are inserted
							// while folding, and so that we can capture them again because old sortable will no longer be fromSortable

							parentEl.appendChild(multiDragElement)
						})
						folding = true
					} // Clones must be shown (and check to remove multi drags) after folding when interfering multiDragElements are moved out

					if (!isOwner) {
						// Only remove if not folding (folding will remove them anyways)
						if (!folding) {
							removeMultiDragElements()
						}

						if (multiDragElements.length > 1) {
							var clonesHiddenBefore = clonesHidden

							activeSortable._showClone(sortable) // Unfold animation for clones if showing from hidden

							if (
								activeSortable.options.animation &&
								!clonesHidden &&
								clonesHiddenBefore
							) {
								multiDragClones.forEach(function (clone) {
									activeSortable.addAnimationState({
										target: clone,
										rect: clonesFromRect
									})
									clone.fromRect = clonesFromRect
									clone.thisAnimationDuration = null
								})
							}
						} else {
							activeSortable._showClone(sortable)
						}
					}
				}
			},
			dragOverAnimationCapture: function dragOverAnimationCapture(_ref11) {
				var dragRect = _ref11.dragRect,
					isOwner = _ref11.isOwner,
					activeSortable = _ref11.activeSortable
				multiDragElements.forEach(function (multiDragElement) {
					multiDragElement.thisAnimationDuration = null
				})

				if (
					activeSortable.options.animation &&
					!isOwner &&
					activeSortable.multiDrag.isMultiDrag
				) {
					clonesFromRect = _extends({}, dragRect)
					var dragMatrix = matrix(dragEl$1, true)
					clonesFromRect.top -= dragMatrix.f
					clonesFromRect.left -= dragMatrix.e
				}
			},
			dragOverAnimationComplete: function dragOverAnimationComplete() {
				if (folding) {
					folding = false
					removeMultiDragElements()
				}
			},
			drop: function drop(_ref12) {
				var evt = _ref12.originalEvent,
					rootEl = _ref12.rootEl,
					parentEl = _ref12.parentEl,
					sortable = _ref12.sortable,
					dispatchSortableEvent = _ref12.dispatchSortableEvent,
					oldIndex = _ref12.oldIndex,
					putSortable = _ref12.putSortable
				var toSortable = putSortable || this.sortable
				if (!evt) return
				var options = this.options,
					children = parentEl.children // Multi-drag selection

				if (!dragStarted) {
					if (options.multiDragKey && !this.multiDragKeyDown) {
						this._deselectMultiDrag()
					}

					toggleClass(
						dragEl$1,
						options.selectedClass,
						!~multiDragElements.indexOf(dragEl$1)
					)

					if (!~multiDragElements.indexOf(dragEl$1)) {
						multiDragElements.push(dragEl$1)
						dispatchEvent({
							sortable: sortable,
							rootEl: rootEl,
							name: 'select',
							targetEl: dragEl$1,
							originalEvent: evt
						}) // Modifier activated, select from last to dragEl

						if (
							evt.shiftKey &&
							lastMultiDragSelect &&
							sortable.el.contains(lastMultiDragSelect)
						) {
							var lastIndex = index(lastMultiDragSelect),
								currentIndex = index(dragEl$1)

							if (~lastIndex && ~currentIndex && lastIndex !== currentIndex) {
								// Must include lastMultiDragSelect (select it), in case modified selection from no selection
								// (but previous selection existed)
								var n, i

								if (currentIndex > lastIndex) {
									i = lastIndex
									n = currentIndex
								} else {
									i = currentIndex
									n = lastIndex + 1
								}

								for (; i < n; i++) {
									if (~multiDragElements.indexOf(children[i])) continue
									toggleClass(children[i], options.selectedClass, true)
									multiDragElements.push(children[i])
									dispatchEvent({
										sortable: sortable,
										rootEl: rootEl,
										name: 'select',
										targetEl: children[i],
										originalEvent: evt
									})
								}
							}
						} else {
							lastMultiDragSelect = dragEl$1
						}

						multiDragSortable = toSortable
					} else {
						multiDragElements.splice(multiDragElements.indexOf(dragEl$1), 1)
						lastMultiDragSelect = null
						dispatchEvent({
							sortable: sortable,
							rootEl: rootEl,
							name: 'deselect',
							targetEl: dragEl$1,
							originalEvent: evt
						})
					}
				} // Multi-drag drop

				if (dragStarted && this.isMultiDrag) {
					folding = false // Do not "unfold" after around dragEl if reverted

					if (
						(parentEl[expando].options.sort || parentEl !== rootEl) &&
						multiDragElements.length > 1
					) {
						var dragRect = getRect(dragEl$1),
							multiDragIndex = index(
								dragEl$1,
								':not(.' + this.options.selectedClass + ')'
							)
						if (!initialFolding && options.animation)
							dragEl$1.thisAnimationDuration = null
						toSortable.captureAnimationState()

						if (!initialFolding) {
							if (options.animation) {
								dragEl$1.fromRect = dragRect
								multiDragElements.forEach(function (multiDragElement) {
									multiDragElement.thisAnimationDuration = null

									if (multiDragElement !== dragEl$1) {
										var rect = folding ? getRect(multiDragElement) : dragRect
										multiDragElement.fromRect = rect // Prepare unfold animation

										toSortable.addAnimationState({
											target: multiDragElement,
											rect: rect
										})
									}
								})
							} // Multi drag elements are not necessarily removed from the DOM on drop, so to reinsert
							// properly they must all be removed

							removeMultiDragElements()
							multiDragElements.forEach(function (multiDragElement) {
								if (children[multiDragIndex]) {
									parentEl.insertBefore(
										multiDragElement,
										children[multiDragIndex]
									)
								} else {
									parentEl.appendChild(multiDragElement)
								}

								multiDragIndex++
							}) // If initial folding is done, the elements may have changed position because they are now
							// unfolding around dragEl, even though dragEl may not have his index changed, so update event
							// must be fired here as Sortable will not.

							if (oldIndex === index(dragEl$1)) {
								var update = false
								multiDragElements.forEach(function (multiDragElement) {
									if (
										multiDragElement.sortableIndex !== index(multiDragElement)
									) {
										update = true
										return
									}
								})

								if (update) {
									dispatchSortableEvent('update')
									dispatchSortableEvent('sort')
								}
							}
						} // Must be done after capturing individual rects (scroll bar)

						multiDragElements.forEach(function (multiDragElement) {
							unsetRect(multiDragElement)
						})
						toSortable.animateAll()
					}

					multiDragSortable = toSortable
				} // Remove clones if necessary

				if (
					rootEl === parentEl ||
					(putSortable && putSortable.lastPutMode !== 'clone')
				) {
					multiDragClones.forEach(function (clone) {
						clone.parentNode && clone.parentNode.removeChild(clone)
					})
				}
			},
			nullingGlobal: function nullingGlobal() {
				this.isMultiDrag = dragStarted = false
				multiDragClones.length = 0
			},
			destroyGlobal: function destroyGlobal() {
				this._deselectMultiDrag()

				off(document, 'pointerup', this._deselectMultiDrag)
				off(document, 'mouseup', this._deselectMultiDrag)
				off(document, 'touchend', this._deselectMultiDrag)
				off(document, 'keydown', this._checkKeyDown)
				off(document, 'keyup', this._checkKeyUp)
			},
			_deselectMultiDrag: function _deselectMultiDrag(evt) {
				if (typeof dragStarted !== 'undefined' && dragStarted) return // Only deselect if selection is in this sortable

				if (multiDragSortable !== this.sortable) return // Only deselect if target is not item in this sortable

				if (
					evt &&
					closest(evt.target, this.options.draggable, this.sortable.el, false)
				)
					return // Only deselect if left click

				if (evt && evt.button !== 0) return

				while (multiDragElements.length) {
					var el = multiDragElements[0]
					toggleClass(el, this.options.selectedClass, false)
					multiDragElements.shift()
					dispatchEvent({
						sortable: this.sortable,
						rootEl: this.sortable.el,
						name: 'deselect',
						targetEl: el,
						originalEvent: evt
					})
				}
			},
			_checkKeyDown: function _checkKeyDown(evt) {
				if (evt.key === this.options.multiDragKey) {
					this.multiDragKeyDown = true
				}
			},
			_checkKeyUp: function _checkKeyUp(evt) {
				if (evt.key === this.options.multiDragKey) {
					this.multiDragKeyDown = false
				}
			}
		}
		return _extends(MultiDrag, {
			// Static methods & properties
			pluginName: 'multiDrag',
			utils: {
				/**
				 * Selects the provided multi-drag item
				 * @param  {HTMLElement} el    The element to be selected
				 */
				select: function select(el) {
					var sortable = el.parentNode[expando]
					if (
						!sortable ||
						!sortable.options.multiDrag ||
						~multiDragElements.indexOf(el)
					)
						return

					if (multiDragSortable && multiDragSortable !== sortable) {
						multiDragSortable.multiDrag._deselectMultiDrag()

						multiDragSortable = sortable
					}

					toggleClass(el, sortable.options.selectedClass, true)
					multiDragElements.push(el)
				},

				/**
				 * Deselects the provided multi-drag item
				 * @param  {HTMLElement} el    The element to be deselected
				 */
				deselect: function deselect(el) {
					var sortable = el.parentNode[expando],
						index = multiDragElements.indexOf(el)
					if (!sortable || !sortable.options.multiDrag || !~index) return
					toggleClass(el, sortable.options.selectedClass, false)
					multiDragElements.splice(index, 1)
				}
			},
			eventProperties: function eventProperties() {
				var _this3 = this

				var oldIndicies = [],
					newIndicies = []
				multiDragElements.forEach(function (multiDragElement) {
					oldIndicies.push({
						multiDragElement: multiDragElement,
						index: multiDragElement.sortableIndex
					}) // multiDragElements will already be sorted if folding

					var newIndex

					if (folding && multiDragElement !== dragEl$1) {
						newIndex = -1
					} else if (folding) {
						newIndex = index(
							multiDragElement,
							':not(.' + _this3.options.selectedClass + ')'
						)
					} else {
						newIndex = index(multiDragElement)
					}

					newIndicies.push({
						multiDragElement: multiDragElement,
						index: newIndex
					})
				})
				return {
					items: _toConsumableArray(multiDragElements),
					clones: [].concat(multiDragClones),
					oldIndicies: oldIndicies,
					newIndicies: newIndicies
				}
			},
			optionListeners: {
				multiDragKey: function multiDragKey(key) {
					key = key.toLowerCase()

					if (key === 'ctrl') {
						key = 'Control'
					} else if (key.length > 1) {
						key = key.charAt(0).toUpperCase() + key.substr(1)
					}

					return key
				}
			}
		})
	}

	function insertMultiDragElements(clonesInserted, rootEl) {
		multiDragElements.forEach(function (multiDragElement, i) {
			var target =
				rootEl.children[
					multiDragElement.sortableIndex + (clonesInserted ? Number(i) : 0)
				]

			if (target) {
				rootEl.insertBefore(multiDragElement, target)
			} else {
				rootEl.appendChild(multiDragElement)
			}
		})
	}
	/**
	 * Insert multi-drag clones
	 * @param  {[Boolean]} elementsInserted  Whether the multi-drag elements are inserted
	 * @param  {HTMLElement} rootEl
	 */

	function insertMultiDragClones(elementsInserted, rootEl) {
		multiDragClones.forEach(function (clone, i) {
			var target =
				rootEl.children[
					clone.sortableIndex + (elementsInserted ? Number(i) : 0)
				]

			if (target) {
				rootEl.insertBefore(clone, target)
			} else {
				rootEl.appendChild(clone)
			}
		})
	}

	function removeMultiDragElements() {
		multiDragElements.forEach(function (multiDragElement) {
			if (multiDragElement === dragEl$1) return
			multiDragElement.parentNode &&
				multiDragElement.parentNode.removeChild(multiDragElement)
		})
	}

	Sortable.mount(new AutoScrollPlugin())
	Sortable.mount(Remove, Revert)

	Sortable.mount(new SwapPlugin())
	Sortable.mount(new MultiDragPlugin())

	return Sortable
})
